C – ArmStrong Number

C Program to check the 3 digits number is Armstrong number or not:

Example:        153  à 1^3 + 5^3 + 3^3 = 153

int main() {             int n, r, sum=0, temp;             printf(“Enter num : “);             scanf(“%d”, &n);             temp=n;             while(n>0){                         r = n%10;                         sum = sum + r*r*r;                         n = n/10;             }             if(temp==sum)                         printf(“Armstrong number \n”);             else                         printf(“Not an Armstrong number \n”);             return 0; }

C Program to check the given number is Armstrong number or not:

• 2-digit number: Sum of squares of individual digits equals to the same number
• 3-digit number: Sum of cubes of individual digits equals to the same number
• 4-digit number: Sum of individual digits power 4 equals to the same number
  • 153 = 1^3 + 5^3 + 3^3 = 153
  • 1634 = 1^4 + 6^4 + 3^4 + 4^4 = 1634

int main() {             int n, r, sum=0, temp, c=0, s, i;             printf(“Enter num : “);             scanf(“%d”, &n);             temp=n;             while(n>0){                         n=n/10;                                   c++;             }             n=temp;             while(n>0){                         r = n%10;                         s=1;                         for(i=1 ; i<=c ; i++)                                     s = s*r;                         sum = sum + s;                         n = n/10;             }             if(temp==sum)                         printf(“Armstrong number \n”);             else                         printf(“Not an Armstrong number \n”); }