C Program to print Armstrong Numbers between 1 and 500

Write a program to print out all Armstrong numbers or Narcissistic number between 1 and 500. If sum of cubes of each digit of the number is equal to the number itself, then the number is called an Armstrong number.

Related Read:
Nested While Loop: C Program
C Program to Check Armstrong Number

For Example:
407 = (4*4*4)+(0*0*0)+(7*7*7)
407 = (64) + (0) + (343)
407 = 407
Hence, 407 is a Armstrong number.

Nested While Loop
In this program we are using nested while loop to check for Armstrong numbers from 1 to 500.

Outer while loop loops from 1 to 500, by incrementing value of count by 1. Inner while loop checks every value of count to determine if the value is a Armstrong number or not.

Logic for Finding Armstrong Number

We’ve explained the logic to find Armstrong number in detail, in our previous video tutorial. Kindly visit C Program to Check Armstrong Number

C Program to print Armstrong Numbers between 1 and 500

Source Code: C Program to print Armstrong Numbers between 1 and 500

#include < stdio.h >

int main()
{
    int num, count = 1, rem, sum;

    while(count <= 500)
    {
        num = count;
        sum = 0;

        while(num)
        {
            rem = num % 10;
            sum = sum + (rem * rem * rem);
            num = num / 10;
        }

        if(count == sum)
        {
            printf("%d is a Armstrong number\n", count);
        }

        count++;
    }

     return 0;
}

Output:
1 is a Armstrong number
153 is a Armstrong number
370 is a Armstrong number
371 is a Armstrong number
407 is a Armstrong number

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