How do I use the if-then statement?

The if-then is the most basic control flow statement. It will execute the block of statement only if the test expression evaluated equals to true. Let’s see the example below:

package org.kodejava.example.lang;

public class IfThenDemo {
    public static void main(String[] args) {
        int a = 10;
        int b = 5;

        // If the evaluation of a > b is true than the if block is
        // executed. In the block below we just print that the value
        // of a is bigger than b.
        if (a > b) {
            System.out.println("A(" + a + ") is bigger than B(" + b + ")");

        // When we have only a single command inside a block we can
        // remove the opening and closing braces for the block ({..}).
        // But it is a good practice to always enclose the block with
        // braces.
        if (b < a)
            System.out.println("B(" + b + ") is smaller that A(" + a + ")");

The result of the above program is:

A(10) is bigger than B(5)
B(5) is smaller that A(10)

Wayan Saryada

Programmer, runner, recreational diver, currently living in the island of Bali, Indonesia. Mostly programming in Java, creating web based application with Spring Framework, Hibernate / JPA.

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