C Program to Calculate Arithmetic Mean

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

How is the Arithmetic Mean calculated?

To calculate the arithmetic mean, use the formula mean = (n1+n2+n2+...+nn)/n. Here, n1 represents the first number, n2 represents the second number, and so on. Whereas n (in the denominator part) is a value that represents the quantity of a number. For example, if there are three numbers, say 3, 5, and 8. So to find its arithmetic mean, use the formula given earlier. Therefore, the arithmetic mean of 3, 5, and 8 will be (3+5+8)/3 or 16/3 or 5.33.

C Arithmetic Mean Program

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

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);
    return 0;

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

c program arithmetic mean

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

arithmetic mean program c

Steps used in previous program

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

The same program in different languages

C Quiz

« Previous Program Next Program »

Liked this post? Share it!