Java Decrement Operator

admin

7 years ago

Table of Contents

Program Description

Write a java program to demo the decrement operator. We will look at a simple java program using the decrement operator. We will have a look at the postfix-decrement operation and prefix-decrement operation in the program.

Syntax

– – Decrement operator: decrements the variable value by 1

Postfix decrement

b=a–;

Prefix decrement

b= –a;

Java Program

// DecrementOperatorDemo.java program
public class DecrementOperatorDemo {

  public static void main(String[] args) {
    int a = 4; 
    a--; 

    //print the variable
    System.out.println("a after Decrement should print 3= " + a);

    int b;
    b= a--;// a is assigned to b and then decremented

    //print the variable
    System.out.println("b after post decrement should print 3= " + b);
    // a value is 2 now
    b= --a;// a value is decremented and assigned to b
    //print the variable
    System.out.println("b after pre decrement should print 1= " + b);
  } 
}

Program Output

a after Decrement should print 3= 3
b after post decrement should print 3= 3
b after pre decrement should print 1= 1