Java - Assignment Operators

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In this tutorial we will learn about assignment operators in Java programming language.

We use the assignment operators to assign any value or result of an expression to a variable.

In the following example we are assigning integer value 10 to a variable points of int type.

int points = 10;

Shorthand Assignment Operators

Lets say, we have an int variable which is initially set to 10. Then we increase the value by 5 and assign the new value to it.

//declare and set value
int x = 10;

//increase the value by 5 and re-assign
x = x + 5;

Another way of writing the code x = x + 5 is by using the shorthand assignment += as shown below.

//declare and set value
int x = 10;

//increase the value by 5 and re-assign
x += 5;

Following is the list of shorthand assignment operators.

Simple assignment Shorthand assignment
x = x + 1 x += 1
x = x - 1 x -= 1
x = x * (n + 1) x *= (n + 1)
x = x / (n + 1) x /= (n + 1)
x = x % y x %= y

Example

In the following example we are adding y to x and assigning the result to x.

class Assignment {
  public static void main(String args[]) {
    int x = 10;
    int y = 20;
    
    // add x and y and save the result in x
    x = x + y;
    
    System.out.println("Result: " + x);
  }
}

Output:

Result: 30

We can achieve the same result by using the += shorthand notation.

class Assignment {
  public static void main(String args[]) {
    int x = 10;
    int y = 20;
    
    // add x and y and save the result in x using shorthand notation
    x += y;
    
    System.out.println("Result: " + x);
  }
}

Output:

Result: 30
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