How do you check if a number is a Kaprekar number?

Calculate the length of square, that is, the number of digits in square. Iterate over the square and in every iteration, divide the square into two parts. Add both the parts and compare the sum with the original number. If the sum and number are both equal, then the number is Kaprekar number and terminate the loop.

What is a Kaprekar number in Java?

A Kaprekar number is a number whose square when divided into two parts and such that sum of parts is equal to the original number and none of the parts has value 0. (

How do you check if a number is an Armstrong number in Java?

Armstrong Number Java Program

1. import java.util.Scanner;
2. import java.lang.Math;
3. public class ArmstsrongNumberExample.
4. {
5. //function to check if the number is Armstrong or not.
6. static boolean isArmstrong(int n)
7. {
8. int temp, digits=0, last=0, sum=0;

How is 297 a Kaprekar number?

Note that 27 × 11 = 297 and when we divide 297 by 37, we get: 297 = 8 × 37 + 1. 297 is a Kaprekar number. Similarly, 37 × 19 = 703 = 27 × 26 + 1 and 703 is a Kaprekar number. There are also higher-power Kaprekar numbers.

How do you read a number in Java?

The following example allows user to read an integer form the System.in.

1. import java.util.*;
2. class UserInputDemo.
3. {
4. public static void main(String[] args)
5. {
6. Scanner sc= new Scanner(System.in); //System.in is a standard input stream.
7. System.out.print(“Enter first number- “);
8. int a= sc.nextInt();

How do you check if it is a number in Java?

An object of type Character contains a single field whose type is char. We can check whether the given character in a string is a number/letter by using isDigit() method of Character class. The isDigit() method is a static method and determines if the specified character is a digit.

How do you check if a number is even in Java?

If a number is evenly divisible by 2 with no remainder, then it is even. You can calculate the remainder with the modulo operator \% like this num \% 2 == 0 . If a number divided by 2 leaves a remainder of 1, then the number is odd. You can check for this using num \% 2 == 1 .

How do I find my 5 digit Armstrong number?

th powers of their digits (a finite sequence) are called Armstrong numbers or plus perfect number and are given by 1, 2, 3, 4, 5, 6, 7, 8, 9, 153, 370, 371, 407, 1634, 8208, 9474, 54748….Narcissistic Number.

Is 6174 a Kaprekar number?

6174 is known as Kaprekar’s constant after the Indian mathematician D. R. Kaprekar. This number is notable for the following rule: Take any four-digit number, using at least two different digits (leading zeros are allowed).