Java program to check armstrong number
Java Programming Language Decision Making and Looping in java (Article) Decision Making and Looping in java (Program)
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Write a program to find out the Armstrong number using user input.: This java program checks if a number is Armstrong or not. Armstrong number is a number which is equal to sum of digits raise.
Program:
import java.util.Scanner; class ArmstrongNumber { public static void main(String args[]) { int n, sum = 0, temp, remainder, digits = 0; Scanner in = new Scanner(System.in); System.out.println("Input a number to check if it is an Armstrong number"); n = in.nextInt(); temp = n; // Count number of digits while (temp != 0) { digits++; temp = temp/10; } temp = n; while (temp != 0) { remainder = temp%10; sum = sum + power(remainder, digits); temp = temp/10; } if (n == sum) System.out.println(n + " is an Armstrong number."); else System.out.println(n + " is not an Armstrong number."); } static int power(int n, int r) { int c, p = 1; for (c = 1; c <= r; c++) p = p*n; return p; } }
Output:
Output 1: Input a number to check if it is an Armstrong number 45781 45781 is not an Armstrong number. Output 2: Input a number to check if it is an Armstrong number 9926315 9926315 is an Armstrong number.
Explanation:
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