- C Programming Examples
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- C Print Hello World
- C Get Input from User
- C Print Integer
- C Add Two Numbers
- C Add Subtract Multiply Divide
- C Add n Numbers
- C Area Perimeter of Square
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- C Area Circum of Circle
- C Fahrenheit to Celsius
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- C Inches to Centimeters
- C Kilogram to Gram
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- C Find Profit Loss
- C Sum of their Square
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- C Round Number to Integer
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- Count Positive Negative Zero
- C Largest of Two Numbers
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- C Smallest of Two Numbers
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- C Find Factorial of Number
- C Find LCM & HCF
- C Find LCM of n Numbers
- C Find HCF of n Numbers
- C Find Arithmetic Mean
- C Find Average, Percentage
- C Find Student Grade
- C Print Table of Number
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# C Program to Calculate Arithmetic Mean

In this article, you will learn and get code about how to find arithmetic mean of given list of number by user (at run-time).

## How Arithmetic Mean gets Calculated ?

To calculate arithmetic mean, use the formula **mean = (n _{1}+n_{2}+n_{2}+...+n_{n})/n**.
Here

**n**represents first number,

_{1}**n**represents second number and so on. Whereas,

_{2}**n**(in denominator part) is a value that represents the quantity of number. For example, if there are three numbers say

**3, 5, 8**. So to find its arithmetic mean, use the formula as given earlier. Therefore, arithmetic mean of

**3, 5, 8**will be

**(3+5+8)/3**or

**16/3**or

**5.33**.

## Arithmetic Mean Program in C

To calculate arithmetic mean in C programming, you have to ask from user to enter, how many numbers he/she want to provide
(quantity) say **3**. Then ask to enter all the numbers (say 3, 5, 8) of that size (3). Now apply the simple formula of
finding arithmetic mean as shown here in the following program:

#include<stdio.h> #include<conio.h> int main() { int i, size; float num, sum, am; printf("How many number to enter ? "); scanf("%d", &size); sum = 0; printf("Enter %d Numbers: ", size); for(i=0; i<size; i++) { scanf("%f", &num); sum = sum+num; } am = sum/size; printf("\nArithmetic Mean = %0.2f", am); getch(); return 0; }

This program is compiled and executed using **Code::Blocks** IDE. Here is the sample run of above program:

Now supply the size (how many number user want to enter to find arithmetic mean of these entered numbers) say **3**. Then enter all
the **3** numbers say **3, 5, 8** and finally press **ENTER** key to see the output as shown in the snapshot given below:

#### Steps used in previous Program

Here are the list of some main steps used in above program:

- Declare any two variable of
**int**(integer type) say**size**and**i** - Declare another three variables of
**float**(floating-point type) say**num, sum**, and**am** - Here
**num**is used to store value of number one by one,**sum**is used to store summation of numbers, and**am**is used to store arithmetic mean value of all the numbers given by user - Scan size from user, that is how many number, he/she want to supply
- Now create a
**for**loop, to scan all the numbers of that size. For example, if user supply 10 as the size, then create a loop, to run 10 times to scan all the 10 numbers one by one - After each scan, apply the summation operation, so that after exiting from the loop, you will have a variable
named
**sum**that holds the summation of all the numbers given by user - Now just apply the arithmetic mean formula and print the value of
**am**as output. That it - The
**%0.2f**format specifier is used to print value upto 2 decimal places only

#### Same Program in Other Languages

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