Problem
How to check whether the given number is an Armstrong number or not using C Programming language?
Solution
Armstrong number is the number that is equal to the sum of cubes of its digits.
Syntax
pqrs………=pow(p,n)+pow(q,n)+pow(r,n)+……….
For example, 153,371,1634, etc., are Armstrong numbers.
153=1*1*1 + 5*5*5 + 3*3*3 =1+125+27 =153 (Armstrong number)
Program
#include<stdio.h> int main(){ int number,remainder,total=0,temp; printf("enter the number="); scanf("%d",&number); temp=number; while(number>0){ remainder=number%10; total=total+(remainder*remainder*remainder); number=number/10; } if(temp==total) printf("This number is Armstrong number"); else printf("This number is not Armstrong number"); return 0; }
Output
enter the number=371 This number is Armstrong number Check: 371=3*3*3 +7*7*7 + 1*1*1 =27 + 343 +1 =371 enter the number=53 This number is not Armstrong number
Explanation
53 = 5*5*5 + 3*3*3 =125 +27 = 152 != 53