C program to check Armstrong number | Armstrong Program in C

 

C program to check Armstrong number

What is Armstrong Number?


  • A number N is an Armstrong number of order n (n being the number of digits)
  • if abed. . . = a^n + b^n + e^n + d^n .+ . . . = N .
  • The number 153 is an Armstrong number of order 3 because
  • l^3 + 5^3 + 3^3 = 1 + 125 + 27 = 153.
  • Likewise, 54748 is an Armstrong number of order 5 because
  • 5^5 + 4^5 + 7^5 + 4^5 + 8^5 = 3125 + 1024 + 16807 + 1024 + 32768 = 54748.

    1. #include<stdio.h>
    2. int main()
    3. {
    4.     int n;
    5.     int r;
    6.     int sum=0;
    7.     int temp;
    8.     printf("Enter a number \n");
    9.     scanf("%d",&n);
    10.     temp=n;
    11.                  while(n>0)
    12.                      {
    13.                        r=n%10;
    14.                        sum=sum+(r*r*r);
    15.                        n=n/10;
    16.                      }
    17.      if(temp == sum)
    18.      printf("Number is a armstrong number\n");
    19.      else
    20.      printf("Number is NOT a armstrong number\n");
    21.      return 0;
    22. }

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