Java program for ++ Increment Operator

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7 years ago

Table of Contents

Introduction

In this post, we will discuss the Increment Operator in java language. We will look at some simple java program using the operator. We will have a look at the postfix-increment operation and prefix-increment operation in the program.

Syntax

++ Increment operator: increments a value by 1

Postfix increment

b = a++;

Prefix increment

b = ++a;

Java Program

// IncrementOperatorDemo.java program
public class IncrementOperatorDemo {

  public static void main(String[] args) {
    int a = 1; 
    a++; 

    //print the variable
    System.out.println("a after increment should print 2= " + a);

    int b;
    b= a++;// a is assigned to b and then incremented

    //print the variable
    System.out.println("b after post increment should print 2= " + b);
    // a value is 3 now
    b= ++a;// a value is incremented and assigned to b
    //print the variable
    System.out.println("b after pre increment should print 4= " + b);
  } 
}

In the program, we have initialized two variables a & b and then increment them using the operator. We print the post incremented ++ variables a & b.

Program Output

a after increment should print 2= 2
b after post increment should print 2= 2
b after pre increment should print 4= 4