61 lines
1.6 KiB
Java
61 lines
1.6 KiB
Java
// Wikipedia for Harshad Number : https://en.wikipedia.org/wiki/Harshad_number
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package Maths;
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import java.util.Scanner;
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public class HarshadNumber
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{
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public static void main(String[] args) {
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Scanner sc = new Scanner(System.in);
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System.out.print("Enter a number : ");
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long a = sc.nextLong();
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checkHarshadNumber(a);
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}
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/**
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* A function to check if a number is Harshad number or not
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*
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* @param a The number which should be checked
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*/
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public static void checkHarshadNumber (long a) {
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long b = a;
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int sum = 0;
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// this is just for showing the explanation else it's of no use you can ommit it
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int[] each = new int[Long.toString(a).length()];
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int c = 0;
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while (b > 0) {
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sum += b % 10;
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each[c] = (int)(b%10);
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b /= 10;
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c++;
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}
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if (a % sum == 0){
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System.out.println(a + " is a Harshad Number");
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// For you better explanation how is that a Harshad Number
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System.out.println("\nExplaination :");
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for (int i = each.length-1; i >=0; i--){
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System.out.print(each[i] + " ");
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if (i != 0) {
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System.out.print("+ ");
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}
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}
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System.out.println("= " + sum);
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System.out.println(sum + " × " + (a / sum) + " = " + a);
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}
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else {
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System.out.println(a + " is not a Harshad Number");
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}
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}
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}
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