C program to check whether the given number is armstrong or not

In this article we will learn to implement a C program to check whether the given number is Armstrong or not. A C program is provided below that reads a number and prints whether it is a Armstrong number or not.

//C program to check whether the given number is an Armstrong number or not
#include<stdio.h>
#include<conio.h>
void main()
{
	int num,dup,sum;
	printf("Enter a +ve integer: ");
	scanf("%d",&num);
	dup=num;
	sum=0;
	while(num>0)
	{
		sum += (num%10)*(num%10)*(num%10);
		num/=10;
	}
	if(dup==sum)
		printf("Given number is Armstrong number");
	else
		printf("Given number is not an Armstrong number");
	getch();
}

Input and output for the above program is as follows:

Enter a +ve integer: 371
Given number is Armstrong 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.