# C calculator

### Description

Solve any math problem with a basic & scientific calc. Use it at work or at school on your iPhone & iPad.

Handy and convenient. Count on it whenever, wherever.
Featured by Digital Trends, Educational App Store, and many more in their top calculator apps.

Free in The Calculator
• Basic & Scientific Calculator
• History Tape: Save, Copy & Share Calculations
• 70+ Amazing Themes
• Edit Equation
• Dictate Equations
• Memory Banks
• Calculate with Degrees or Radians
• Set the Number of Decimals

The Calculator supports:
• Voice Control • Dark Mode • Apple Watch • Drag and Drop • Split View

Have any questions? Please check out if the answers are available in the Frequently Asked Questions in the app Settings.
Have suggestions or unable to find the answers to your questions? Our support team is ready and happy to help at [email protected]!

• 3-Day Free Trial • Ad-Free • Unlimited Fraction Calculations • Unlimited Currency Conversions (Bitcoin included) • Premium Customer Support

If you choose to purchase a subscription, payment will be charged to your Apple ID account, and your account will be charged within hours prior to the end of the free trial or current period. Subscription with a free trial period will automatically renew to a paid subscription. Any unused portion of a free trial period (if offered) will be forfeited when you purchase a premium subscription during the free trial period. You can cancel the automatic renewal of your subscription at any time by going to your settings in the iTunes & App Store after purchase. The cancellation will take effect the day after the last day of the current subscription period, and you will be downgraded to the free service.

LIST OF MATHEMATICAL OPERATIONS
Addition, Subtraction, Division, Multiplication, Percentages, Square, Cubic Exponent, Nth Exponent, Square Root, Cubic Root, Nth Root, Engineering Exponent, Factorial, Power of Two, Power of Ten, Power of E, Natural Logarithm, Common Logarithm, Binary Logarithm, Sine, Cosine, Tangent, Arc Sine, Arc Cosine, Arc Tangent, Hyperbolic Sine, Hyperbolic Cosine, Hyperbolic Tangent, Hyperbolic ArcSine, Hyperbolic Arc Cosine, Hyperbolic ArcTangent, Multiplicative Inverse, Random Number Input

SHARE YOUR CALCULATION, WHEREVER YOU ARE
Having a great result with your calculation or currency conversion? Save time and send it to your contacts fast & simple… by sharing with the calculator!

EDIT EQUATION
You can edit both digits and operators of the current equation. You can place the edit cursor by tapping or using the arrows.

DICTATE & VOICE CONTROL
Make your daily work tasks faster and easier. Simply use your voice to dictate equations by tapping on the mic icon. Dictate works best when you speak naturally as if you were talking to another person.
Currently, Dictate supports only basic calculations.
*This feature requires ‘allow microphone access’ & Siri being enabled in Settings.

• WE LOVE FEEDBACK •

>> START CALCULATING

The Calculator (C) Impala Studios.

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### Currency calculator

Currency calculator stopped working, said I was out of uses
What the heck !

Thank you for your feedback on our app and subscription model. We do our best to offer good value for our premium subscribers while still offering the regular app for free. We will take your feedback into account with this, and will consider it for future improvements.

If you have more feedback regarding the subscription model or the app in general, please feel free to contact us at [email protected]

### Seriously?

Ok my iPhone have a free apple calc but I have to pay for one on my iPad? Or be harassed once this monstrosity loads with non stop analytical ads with geolocates you guys put a whole lotta thought into making things way more difficult than they have to be.

I'm inconvenienced to say the least I hope iPhone x craps out, and apple shares plummet lol.

I like my iPad, not impressed with apple right now tho.

### Ads are so prevalent, it's impossible to use

This is an example of a very aggressive model for ads that ruins the user experience. Yes, I could purchase the ad-free version, but within 5 minutes I was so annoyed that I removed the application. I can appreciate that the developers need to make money and I would gladly pay if they weren't so outrageously aggressive in forcibly placing ads that block calculations on screen.

Hi,

Our apologies for the advertisements in the ads. We are constantly working hard on maintaining and improving our app, so we can offer the best product to our users for free. Unfortunately we have to use advertisement in order to fund this. We do want to thank you for your feedback, we will use this to balance the amount of ads better in the future.

I would also like to point out that our ads should not block out any calculations on screen, so if this happened then it's most likely a bug. We would like to fix this as soon as possible, and could use your help in this. If could send us a screenshot of this happening to [email protected] that would be greatly appreciated.

### Subscriptions

Free Trial

The developer, International Travel Weather Calculator, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer's privacy policy.

### Data Used to Track You

The following data may be used to track you across apps and websites owned by other companies:

• Identifiers
• Usage Data
• Diagnostics

Privacy practices may vary, for example, based on the features you use or your age. Learn More

### Information

Seller
International Travel Weather Calculator

Size
MB

Category
Utilities

Compatibility
iPhone
Requires iOS or later.
iPod touch
Requires iOS or later.
Mac
Requires macOS or later and a Mac with Apple M1 chip.
Languages

English, Danish, Dutch, Finnish, French, German, Greek, Indonesian, Italian, Japanese, Korean, Malay, Norwegian Bokmål, Norwegian Nynorsk, Portuguese, Russian, Simplified Chinese, Spanish, Swedish, Thai, Traditional Chinese, Vietnamese

Age Rating
4+

Price
Free

In-App Purchases

1. 1 Month Premium Access$2. Yearly Premium Member$
3. Monthly Premium Member$4. Smart Currency & Fraction Calc$
5. 6 Months Premium Access$6. Premium Member Special Offer$
7. Premium Member Special Offer$8. Premium Member Special Offer$
9. Premium Membership Yearly$10. Half-Yearly Premium Member$

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Sours: https://apps.apple.com/ca/app/the-calculator/id

## Erlang Calculator - for Call Centre Staffing (Online Version )

### Statistics from All Erlang Calculations

Number of Erlang Calculations performed
Past 24 HoursPast Month
3,73,

Average Values Entered
AHT (Seconds)
AHT (Minutes)
Average Service Level%
Average Shrinkage27%
Average Max Occupancy%
Above figures include calls and other work tasks

### How To Use This Erlang Calculator

1. If you have calls per hour, then enter the number of incoming contacts as and the period is 60 minutes.
2. The Average Handling Time is the amount of time that a person (an agent) takes to handle a phone contact. This includes the talk time as well any paperwork time (wrap-up time) before they are able to answer the next call. This should be in seconds.
3. Put in your Service Level target and time. So if you wanted to handle 90% of calls in 15 seconds, put in 90 and If you are uncertain of this the industry "average" is 80% of calls answered in 20 seconds.
4. This contact centre staffing Erlang calculator is a hybrid model based on both the Erlang C formula the Erlang A formula. The Erlang C formula was invented by the Danish Mathematician A.K. Erlang and is used to calculate the number of advisors and the service level. Call Abandons are calculated using the Erlang A formula which was devised by Swedish statistician Conny Palm in This assumes an Average Patience - also know as Average Time to Abandon (ATA).
5. We also have a more flexible Microsoft Excel based version of this calculator. You can download the free Excel Erlang Calculator
6. This calculator works on probabilities, so may appear to overstate the number of agents needed at low levels. So for example if you enter 0 calls per hour it will say that you need 1 agent. This is quite correct, as there may be a possibility that one call may come in. In practicality, you may decide to not schedule any staff.
7. The maximum number of agents that the calculator can calculate before shrinkage is applied is 10, Agents.
9. The maximum occupancy is designed to improve accuracy. If you take Occupancy over 85% - 90% for long periods you will find that it gets hidden in a longer AHT figure, and agent burn out happens.
10. Call Abandons are calculated using the Erlang A formula, which assumes an Average Patience -also know as Average Time to Abandon (ATA).
11. The Calculator can deal with up to 10, agents, thanks to some help with the maths from Philip Wright CEng – (Former Technical Director & CTO Europe at Aspect Telecommunications/Communications ).

### Need To Include WebChat And Emails?

Need a Multi-Channel calculator? Then use our free Multi Channel Calculator

### Terms and Conditions

Use of the Erlang C Calculator is subject to our standard terms and conditions.

Sours: https://www.callcentrehelper.com/tools/erlang-calculator/

Percentage calculator
The percentage calculator allows you to find out what the amount, the percentage, the percent amount, the percent increase or the percent decrease is, if you know any of the two.

Simple Tiling Calculator
This calculator allows you to calculate how many tiles you need to cover a simple rectangular area. Works both in metric and imperial units. Works for both rectangular and square tiles.

### Financial

Bond Valuation
The purpose of this calculator is to provide calculations and details for bond valuation problems. It is assumed that all bonds pay interest semi-annually. Future versions of this calculator will allow for different interest frequency.
Car Lease
This calculator lets you calculate your estimated lease payments.
General Loan
This calculator allows you to calculate monthly payment, interest rate, total payments, and total interest of your loan.
Loan Length Calculator
Enter how much you want to spend each month, an interest rate, and a loan amount and the calculator tells you how long it will take you to pay it off!
Stocks vs. Bonds
How much do I keep in stocks and bonds?

### Financial Savings

Future Value/Annuity Calculation
Find out how much to put away tax deferred to get a certain amount of money in the future, and how much you could expect to draw out of that money. Just put in some numbers to see!
How long until you are a millionaire?
This calculator allows you to calculate how long it will take until you reach your desired account balance.
IRA/(k)/(b) Retirement Calculation
Find out how much to put away tax deferred to get a certain amount of money in the future, and how much you could expect to draw out of that money. Just put in some numbers to see!

### Financial Home

Home Equity Calculator
Use this calculator to see how much you may be eligible to borrow.
How much house can I afford?
This calculator allows you to calculate the amount you can afford to pay for a mortgage.
Mortgage Payment
The Mortgage Payment Calculator allows you to calculate monthly payments, average monthly interest, total interest, and total payment.
This calculator allows you to compare renting versus buying by entering how much you want to spend a month and how much down you would put into your house.
Simple Mortgage Payment Calculator
This calculator allows you to calculate monthly payment, average monthly interest, total interest, and total payment of your mortgage.

### Fun

Astrological Signs Calculator
Find out your Western Sun Sign, and your Eastern or Chinese Sign.
Days until Christmas
Use this calculator to find out how many days are left until Christmas.
The Love Calculator
Fill in your name and his/her name and find out what are the chances for the two of you!
Love Compatibility Calculator
To find out what the chances for you and your dream partner are, just fill in your and his or her Info and click Calculate.

### Sports & Hobbies

High Performance Bass Fishing Boat Speed Calculator
Online High Performance Bass Fishing Boat Speed Calculator
Miles per Hour Calculator
This calculator allows you to calculate miles per hour.

### Health & Fitness

Body Mass Index Calculator
This calculator allows you to calculate your Body Mass Index (BMI). Body Mass Index (BMI) is a person's weight in kilograms divided by the square of height in meters. Find out your BMI and what it means for your health.
Pregnancy Calculator
This calculator allows you to calculate your due date, conception date, and fetal age.

### Converters

Currency calculator
Currency calculator allows you to convert between currencies. Exchange between dollars, pounds, euro, yen, yuan, and many more.
Data Size Calculator
This calculator allows you to calculate data size in bits, nibbles, bytes, kilobytes, megabytes, gigabytes, and terabytes.
Temperature calculator
The temperature calculator allows you to convert temperature degrees between Celsius, Fahrenheit, Kelvin, Rankine, Delisle, Newton, Réaumur and Rømer. Enter a value in any field to see the other values.

### Math

Perches to square meters and square feet Calculator
Online Perches to meters and feet Calculator.
Stem and Leaf Plot
This calculator allows you to create a special table where each data value is split into a stem (the first digit or digits) and a leaf (usually the last digit).
Sours: https://calculator.com/
Building a Basic Calculator - C - Tutorial 13

## Combinations Calculator (nCr)

### Calculator Use

The Combinations Calculator will find the number of possible combinations that can be obtained by taking a sample of items from a larger set. Basically, it shows how many different possible subsets can be made from the larger set. For this calculator, the order of the items chosen in the subset does not matter.

Factorial
There are n! ways of arranging n distinct objects into an ordered sequence, permutations where n = r.
Combination
The number of ways to choose a sample of r elements from a set of n distinct objects where order does not matter and replacements are not allowed.
Permutation
The number of ways to choose a sample of r elements from a set of n distinct objects where order does matter and replacements are not allowed.  When n = r this reduces to n!, a simple factorial of n.
Combination Replacement
The number of ways to choose a sample of r elements from a set of n distinct objects where order does not matter and replacements are allowed.
Permutation Replacement
The number of ways to choose a sample of r elements from a set of n distinct objects where order does matter and replacements are allowed.
n
the set or population
r
subset of n or sample set

### Combinations Formula:

$$C(n,r) = \dfrac{n!}{( r! (n - r)! )}$$

For n ≥ r ≥ 0.

The formula show us the number of ways a sample of “r” elements can be obtained from a larger set of “n” distinguishable objects where order does not matter and repetitions are not allowed. [1] "The number of ways of picking r unordered outcomes from n possibilities." [2]

Also referred to as r-combination or "n choose r" or the binomial coefficient.  In some resources the notation uses k instead of r so you may see these referred to as k-combination or "n choose k."

### Combination Problem 1

Choose 2 Prizes from a Set of 6 Prizes

You have won first place in a contest and are allowed to choose 2 prizes from a table that has 6 prizes numbered 1 through 6. How many different combinations of 2 prizes could you possibly choose?

In this example, we are taking a subset of 2 prizes (r) from a larger set of 6 prizes (n). Looking at the formula, we must calculate “6 choose 2.”

C (6,2)= 6!/(2! * ()!) = 6!/(2! * 4!) = 15 Possible Prize Combinations

The 15 potential combinations are {1,2}, {1,3}, {1,4}, {1,5}, {1,6}, {2,3}, {2,4}, {2,5}, {2,6}, {3,4}, {3,5}, {3,6}, {4,5}, {4,6}, {5,6}

### Combination Problem 2

Choose 3 Students from a Class of 25

A teacher is going to choose 3 students from her class to compete in the spelling bee. She wants to figure out how many unique teams of 3 can be created from her class of

In this example, we are taking a subset of 3 students (r) from a larger set of 25 students (n). Looking at the formula, we must calculate “25 choose 3.”

C (25,3)= 25!/(3! * ()!)= 2, Possible Teams

### Combination Problem 3

A restaurant asks some of its frequent customers to choose their favorite 4 items on the menu. If the menu has 18 items to choose from, how many different answers could the customers give?

Here we take a 4 item subset (r) from the larger 18 item menu (n). Therefore, we must simply find “18 choose 4.”

C (18,4)= 18!/(4! * ()!)= 3, Possible Answers

### Handshake Problem

In a group of n people, how many different handshakes are possible?

First, let's find the total handshakes that are possible. That is to say, if each person shook hands once with every other person in the group, what is the total number of handshakes that occur?

A way of considering this is that each person in the group will make a total of n-1 handshakes. Since there are n people, there would be n times (n-1) total handshakes. In other words, the total number of people multiplied by the number of handshakes that each can make will be the total handshakes. A group of 3 would make a total of 3() = 3 * 2 = 6. Each person registers 2 handshakes with the other 2 people in the group; 3 * 2.

Total Handshakes = n(n-1)

However, this includes each handshake twice (1 with 2, 2 with 1, 1 with 3, 3 with 1, 2 with 3 and 3 with 2) and since the orginal question wants to know how many different handshakes are possible we must divide by 2 to get the correct answer.

Total Different Handshakes = n(n-1)/2

### Handshake Problem as a Combinations Problem

We can also solve this Handshake Problem as a combinations problem as C(n,2).

n (objects) = number of people in the group
r (sample) = 2, the number of people involved in each different handshake

The order of the items chosen in the subset does not matter so for a group of 3 it will count 1 with 2, 1 with 3, and 2 with 3 but ignore 2 with 1, 3 with 1, and 3 with 2 because these last 3 are duplicates of the first 3 respectively.

$$C(n,r) = \dfrac{n!}{( r! (n - r)! )}$$

$$C(n,2) = \dfrac{n!}{( 2! (n - 2)! )}$$

expanding the factorials,

$$= \dfrac{1\times2\times\times(n-2)\times(n-1)\times(n)}{( 2\times1\times(1\times2\times\times(n-2)) )}$$

cancelling and simplifying,

$$= \dfrac{(n-1)\times(n)}{2} = \dfrac{n(n-1)}{2}$$

which is the same as the equation above.

### References

[1] Zwillinger, Daniel (Editor-in-Chief). CRC Standard Mathematical Tables and Formulae, 31st Edition New York, NY: CRC Press, p. ,

Sours: https://www.calculatorsoup.com/calculators/discretemathematics/combinations.php

## Permutation and Combination Calculator

### Result

 Permutations, nPr = = 30
 Combinations, nCr = = 15

Permutations and combinations are part of a branch of mathematics called combinatorics, which involves studying finite, discrete structures. Permutations are specific selections of elements within a set where the order in which the elements are arranged is important, while combinations involve the selection of elements without regard for order. A typical combination lock for example, should technically be called a permutation lock by mathematical standards, since the order of the numbers entered is important; is not the same as , whereas for a combination, any order of those three numbers would suffice. There are different types of permutations and combinations, but the calculator above only considers the case without replacement, also referred to as without repetition. This means that for the example of the combination lock above, this calculator does not compute the case where the combination lock can have repeated values, for example,

### Permutations

The calculator provided computes one of the most typical concepts of permutations where arrangements of a fixed number of elements r, are taken from a given set n. Essentially this can be referred to as r-permutations of n or partial permutations, denoted as nPr, nPr, P(n,r), or P(n,r) among others. In the case of permutations without replacement, all possible ways that elements in a set can be listed in a particular order are considered, but the number of choices reduces each time an element is chosen, rather than a case such as the "combination" lock, where a value can occur multiple times, such as For example, in trying to determine the number of ways that a team captain and goalkeeper of a soccer team can be picked from a team consisting of 11 members, the team captain and the goalkeeper cannot be the same person, and once chosen, must be removed from the set. The letters A through K will represent the 11 different members of the team:

A B C D E F G H I J K   11 members; A is chosen as captain

B C D E F G H I J K   10 members; B is chosen as keeper

As can be seen, the first choice was for A to be captain out of the 11 initial members, but since A cannot be the team captain as well as the goalkeeper, A was removed from the set before the second choice of the goalkeeper B could be made. The total possibilities if every single member of the team's position were specified would be 11 &#; 10 &#; 9 &#; 8 &#; 7 &#; &#; 2 &#; 1, or 11 factorial, written as 11!. However, since only the team captain and goalkeeper being chosen was important in this case, only the first two choices, 11 &#; 10 = are relevant. As such, the equation for calculating permutations removes the rest of the elements, 9 &#; 8 &#; 7 &#; &#; 2 &#; 1, or 9!. Thus, the generalized equation for a permutation can be written as:

Or in this case specifically:

 11P2 = = = 11 &#; 10 =

Again, the calculator provided does not calculate permutations with replacement, but for the curious, the equation is provided below:

nPr = nr

### Combinations

Combinations are related to permutations in that they are essentially permutations where all the redundancies are removed (as will be described below), since order in a combination is not important. Combinations, like permutations, are denoted in various ways, including nCr, nCr, C(n,r), or C(n,r), or most commonly as simply

. As with permutations, the calculator provided only considers the case of combinations without replacement, and the case of combinations with replacement will not be discussed. Using the example of a soccer team again, find the number of ways to choose 2 strikers from a team of Unlike the case given in the permutation example, where the captain was chosen first, then the goalkeeper, the order in which the strikers are chosen does not matter, since they will both be strikers. Referring again to the soccer team as the letters Athrough K, it does not matter whether Aand then Bor Band then Aare chosen to be strikers in those respective orders, only that they are chosen. The possible number of arrangements for all npeople, is simply n!, as described in the permutations section. To determine the number of combinations, it is necessary to remove the redundancies from the total number of permutations ( from the previous example in the permutations section) by dividing the redundancies, which in this case is 2!. Again, this is because order no longer matters, so the permutation equation needs to be reduced by the number of ways the players can be chosen, Athen Bor Bthen A, 2, or 2!. This yields the generalized equation for a combination as that for a permutation divided by the number of redundancies, and is typically known as the binomial coefficient:
 nCr =

Or in this case specifically:

 11C2 = = = 55

It makes sense that there are fewer choices for a combination than a permutation, since the redundancies are being removed. Again for the curious, the equation for combinations with replacement is provided below:

nCr
 (r + n -1)! r! &#; (n - 1)!
Sours: https://www.calculator.net/permutation-and-combination-calculator.html
Create Calculator in C programming Language in just 10 minutes with line by line code explanation

Sleep breathing began to increase. I knew that I would not be able to pull it out for a long time. I stood with my back to the rest, and could not see what they were doing. Everything was so mediocre in my stretched cunt.

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