Java program to write odd and even numbers into two files

In this tutorial, we discuss a concept of Java program to display even and odd number in the given range

What is odd or even?

When you divide a number by two and if the balance is zero, it is an even number

when the  number divided by two  and if the balance is one, it is an odd number

Example of even number 2,4,6,8,…..

Example of odd number 1,3,5,7,…..

Here we will use a modular operator to display odd or even number in the given range.

if n%2==0,  n is a even number

if n%2==1,  n is a odd number

Program 1

This program allows the user to enter two different digits and then, the program will display odd numbers and even numbers between entered digits using for loop

When the above code is executed, it produces the following results

Program 2

This program allows the user to enter two different digits and then, the program will display odd numbers and even numbers between entered digits using while loop

When the above code is executed, it produces the following results

Program 3

This program allows the user to enter two different digits and then, the program will display odd numbers and even numbers between entered digits using a do-while loop

When the above code is executed, it produces the following results

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JavaObject Oriented ProgrammingProgramming

To split the Even and Odd elements into two different lists, the Java code is as follows −

Example

 Live Demo

Output

Console input

A class named ‘Demo’ contains the main function that asks for the number of elements that should be stored in the array and declares two new arrays that will store the odd values and even values respectively. The array elements are taken from the user and a ‘for’ loop is run to check if the number is divisible by 0, i.e checking if the remainder when the number is divided by 2 is 0. If yes, then that number from the main array will be stored in the even array, and in the odd array otherwise. Since 1 is neither even nor odd, it prints the message while storing 1 in the even or odd array.

Updated on 07-Jul-2020 09:16:21

import java.util.Scanner; public class EvenOdd { public static void main(String[] args) { Scanner reader = new Scanner(System.in); System.out.print("Enter a number: "); int num = reader.nextInt(); if(num % 2 == 0) System.out.println(num + " is even"); else System.out.println(num + " is odd"); } }

Output

In the above program, a Scanner object, reader is created to read a number from the user's keyboard. The entered number is then stored in a variable num.

Now, to check whether num is even or odd, we calculate its remainder using % operator and check if it is divisible by 2 or not.

For this, we use if...else statement in Java. If num is divisible by 2, we print num is even. Else, we print num is odd.

We can also check if num is even or odd by using ternary operator in Java.

Example 2: Check whether a number is even or odd using ternary operator

Output

In the above program, we've replaced if...else statement with ternary operator (? :).

Here, if num is divisible by 2, "even" is returned. Else, "odd" is returned. The returned value is saved in a string variable evenOdd.

Then, the result is printed on the screen using string concatenation.