Perfect Number in C

Here you will get program for perfect number in C.

Perfect number is a positive number which is equal to the sum of all its divisors excluding itself.

For example:

28 is a perfect number as 1 + 2 + 4 + 7 + 14 = 28.

15 is not perfect number as 1 + 3 + 5 is not equal to 15.

Below I have shared a program to check whether a number is a perfect number or not.

Program for Perfect Number in C

#include<stdio.h>

int main(){
	int num,j,s=0;
	printf("Enter a number:");
	scanf("%d",&num);
	
	for(j=1;j<num;++j){
		if(num%j==0){
			s=s+j;
		}
	}

	if(s==num){
		printf("Perfect Number");
	}	
	else{
		printf("Not perfect number");
	}
	
	return 0;
}

Output