How to check Odd and Even Number in java -

import java.util.Scanner;
class OddOrEven {
  public static void main(String args[]) {
    int x;
    System.out.println("Enter an integer to check if it is odd or even ");
    Scanner in = new Scanner(System.in);
    x = in.nextInt();
    if (x % 2 == 0)
      System.out.println("You entered an even number.");
    else
      System.out.println("You entered an odd number.");

  }
}

Step-by-Step Explanation:

1. Import Scanner class:

import java.util.Scanner;

It is used to import the Scanner class from java.util package. This class reads input from users.

2. Class Declaration:

class OddOrEven

Declare a class named OddOrEven, that holds the logic to decide if an integer passed as a parameter is odd or even.

3. Declaration of Main Method:

public static void main(String args[]) {

// This will be where program execution will begin

4. Declaration of the Integer Variable

int x;

A variable x of type int is declared to hold the number taken as input by the user.

5. Getting User Input

System.out.println(“Enter an integer to check if it is odd or even “);

This statement prints out a message requesting the user to enter an integer so that the program can determine if it is odd or even.

6. Create the Scanner Object:

Scanner in = new Scanner(System.in);

A Scanner object called in is created to read input from the console.

7. Read the Integer Input:

x = in.nextInt();

The program reads an integer input given by the user and assigns it to the variable x.

8. Check If the Number Is Even or Odd:

if (x % 2 == 0) {

System.out.println(“You entered an even number.”);

} else {

System.out.println(“You entered an odd number.”);

}

The program makes use of the modulus operator (%) to check if the number is divisible by 2 (even).

When x % 2 == 0, the number is a multiple of 2 and so is even. The program will print “You entered an even number.”
When x % 2!= 0, the number is odd. The program prints “You entered an odd number.”

9. Program Termination

Once the program has printed the output, it ends.

Example Run

Example 1: User Inputs an Even Number

Input

Enter an integer to determine whether it is odd or even

The user inputs 24, which is a number that is even.
The program checks 24 % 2 == 0, which is true, so it prints:

Output:

You input an even number.

Example 2: User Enters an Odd Number

Input:

Enter an integer to see if it’s odd or even

User enters 19, which is an integer that’s odd.

Program tests 19 % 2 == 0, which is false prints:

Output:

You typed in an odd number.

Summary of Output

1. For input 24 is an even integer:

You entered an even number.

2. With the input 19 being an odd integer:

You typed an odd number.

Conclusion

The program asks the user for an integer input.
It checks the number if it is even that is when the number is divisible by 2 without a remainder, and odd if it is not divisible by 2.
The number is in the message of the program whether it is odd or even as a result of checking.