C program for perfect number

Suryateja Pericherla 01/23/2025 6:22pm GMT+0530 Categories: Others. No Comments

In this article we will learn to implement a C program for perfect number. A C program is provided below to check whether the given number is a perfect number or not.

Examples of perfect numbers are: 6, 28, 496, etc.

Program is as follows:

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

Input and output for the above program is as follows:

Enter a number: 28
28 is a perfect number

Suryateja Pericherla

Suryateja Pericherla, at present is a Research Scholar (full-time Ph.D.) in the Dept. of Computer Science & Systems Engineering at Andhra University, Visakhapatnam. Previously worked as an Associate Professor in the Dept. of CSE at Vishnu Institute of Technology, India.

He has 11+ years of teaching experience and is an individual researcher whose research interests are Cloud Computing, Internet of Things, Computer Security, Network Security and Blockchain.

He is a member of professional societies like IEEE, ACM, CSI and ISCA. He published several research papers which are indexed by SCIE, WoS, Scopus, Springer and others.

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