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C : Calculate Average Using Arrays

Tutorial by:Manisha Dubey      Date: 2016-06-17 03:59:28

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This program takes n number of element from user(where, n is specified by user), stores data in an array and calculates the average of those numbers.

Source Code to Calculate Average Using Arrays

#include <stdio.h>
int main(){
    int n, i;
    float num[100], sum=0.0, average;
    printf("Enter the numbers of data: ");
    while (n>100 || n<=0)
        printf("Error! number should in range of (1 to 100).\n");
        printf("Enter the number again: ");
   for(i=0; i<n; ++i)
      printf("%d. Enter number: ",i+1);
   printf("Average = %.2f",average);
   return 0;


Enter the numbers of data: 6
1. Enter number: 45.3
2. Enter number: 67.5
3. Enter number: -45.6
4. Enter number: 20.34
5. Enter number: 33
6. Enter number: 45.6
Average = 27.69


This program calculates the average if the number of data are from 1 to 100. If user enters value of n above 100 or below 100 then, while loop is executed which asks user to enter value of n until it is between 1 and 100.

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