C Program to Check whether a given Number is Perfect Number

#include < stdio.h>
 
int main()
{
    int number, rem, sum = 0, i;
 
    printf("Enter a Number\n");
    scanf("%d", &number);
    for (i = 1; i <= (number - 1); i++)
    {
        rem = number % i;
	if (rem == 0)
        {
            sum = sum + i;
        }
    }
    if (sum == number)
        printf("Entered Number is perfect number");
    else
        printf("Entered Number is not a perfect number");
    return 0;
}

Output

 Enter a Number
 6 
Entered Number is perfect number
 
   
Enter a Number
 100 
Entered Number is not a perfect number

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