C program to find and print Armstrong numbers

This C program finds and prints Armstrong number between two numbers. This example prints Armstrong numbers from 1 to a number entered by the user.

Armstrong number: A number is called an Armstrong number, if the sum of cubes of each digit is equal to the number itself. For example, 153 is an Armstrong number because 153 = 1*1*1 + 5*5*5 + 3*3*3 .

Program: C program to print Armstrong numbers from 1 to 1000.

Output: Armstrong numbers from 1 to 1000

Enter the upper limit, N: 1000
All Armstrong numbers from 1 to 1000: 

0       1       153     370     371     407

The same algorithm can be used to check whether a number is Armstrong number or not.

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