How to Calculate Average Using Arrays in C program?

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

#include <stdio.h>

int main()

{

    int n, i;

    float num[100], sum = 0.0, average;

    printf("Enter the numbers of elements: ");

    scanf("%d", &n);

    while (n > 100 || n <= 0)

    {

        printf("Error! number should in range of (1 to 100).\n");

        printf("Enter the number again: ");

        scanf("%d", &n);

    }

    for(i = 0; i < n; ++i)

    {

        printf("%d. Enter number: ", i+1);

        scanf("%f", &num[i]);

        sum += num[i];

    }

    average = sum / n;

    printf("Average = %.2f", average);

    return 0;

}