ARMSTRONG NUMBER PROGRAM IN C

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 In this example, you will learn a program to check whether given number is Armstrong  number or not.

Armstrong Number:

If sum of cubes of digits of a number is equal to the original number itself, is called as Armstrong Number.

Example:

consider the number 153,

Let's calculate the sum of cubes of its all digits.

i.e. 1 + 125 + 27 = 153, and this is equal to the original n umber(153) itself.

Thus. 153 is Armstrong number .


Program to check whether a given number is Armstrong number or not:

//check whether given number is prime or not

#include<stdio.h> 
int main( )
{
int num, r, sum=0, temp=0; 
printf("Enter the number :");
scanf("%d",&num);
temp=num;

while(num!=0)
{ 
r=num%10;                          // to get last digit of number
sum=sum + r*r*r    
num= num/10;  
}

if(temp==sum)
printf("%d is Armstrong number",temp);
else
printf("%d is not Armstrong number",temp);

return 0;
}


Output:


Enter the number:153
153 is Armstrong number


Enter the number:162
162 is not Armstrong number



Try this by your own! 
If you have any doubts feel free to drop a comment. I'll be happy to answer your questions in the comment section.
Keep coding...


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