If

Conditional programming includes the use of if statements.

Below is an example of an if statement. It checks against the input given by the user and outputs to the screen based off that input.

import java.util.Scanner;

public class If {

  public static void main(String[] args) {
    System.out.println("Make a choice: ");
    System.out.println("1. Say Hello");
    System.out.println("2. Say Goodbye");

    Scanner scan = new Scanner(System.in);

    System.out.print("Your choice: ");
    int choice = scan.nextInt();

    if (choice == 1) {
      System.out.println("Hello World");
    }

    if (choice == 2) {
      System.out.println("Goodbye World");
    }
  }
}

Source Code