Armstrong number in c: This program prints armstrong number. In our program we ask the user to enter a number and then we use a loop from one to the entered number and check if it is an armstrong number and if it is then the number is printed on the screen. Remember a number is armstrong if the sum of cubes of individual digits of a number is equal to the number itself. For example 371 is an armstrong number as 3^{3} + 7^{3} + 1^{3} = 371. Some other armstrong numbers are 0, 1, 153, 370, 407.

## C programming code

#include <stdio.h> int main() { int r; long number = 0, c, sum = 0, temp; printf("Enter an integer upto which you want to find armstrong numbers\n"); scanf("%ld",&number); printf("Following armstrong numbers are found from 1 to %ld\n",number); for( c = 1 ; c <= number ; c++ ) { temp = c; while( temp != 0 ) { r = temp%10; sum = sum + r*r*r; temp = temp/10; } if ( c == sum ) printf("%ld\n", c); sum = 0; } return 0; }

Download Generate Armstrong numbers program.

Output of program: