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## Introduction

Write a C program to check whether a number is Armstrong number or not

## What is Armstrong number?

An Armstrong number is an n-digit number that is equal to the sum of the nth powers of its digits.

**For Example: **407 = 4^{3} + 0^{3} + 7^{3} = 64 + 0 + 343 = 407

#include<stdio.h> int main() { int num, sum = 0, i, r; //Reading a number from user printf("Please enter a number: "); scanf("%d",&num); //Finding armstrong number or not for(i = num; i>0; i=i/10) { r = i%10; sum = sum + r * r * r; } if ( num == sum ){ printf("%d is an armstrong number.",num); } else{ printf("%d is not an armstrong number.",num); } return 0; }