Array 01

#include <stdio.h>
int main()
{
    int n,i;
    float average, sum = 0.0,num[101];
    printf("Enter the number of data:");
    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=1; i<=n;i++){
        printf("%d. Enter number:", i);
        scanf("%f",&num[i]);
        sum+=num[i];
    }

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

    return 0;

}