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C Program to check a number is Armstrong or not


In this program, You will learn how to check a number is Armstrong or not in c.


Some list of Armstrong numbers is : 153, 370, 371, 407

Example: How to check a number is Armstrong or not in c

#include<stdio.h>
int main() {

  int x, y, r, arm = 0;
  printf("Enter a number:");
  scanf("%d", &x);

  y = x;
  while (x > 0) {
    r = x % 10;
    arm = arm + r * r * r;
    x = x / 10;
  }

  if (y == arm) {
    printf("Number is Armstrong:%d", y);
  } else {
    printf("Number is not Armstrong:%d", y);
  }

  return 0;
}

Output:

Enter a number:153
Number is Armstrong:153