What does + mean in java

The plus sign ( ) in Java has two uses: arithmetic operator (used to add two numbers) and unary increment operator (used to increment a variable value).

Plus sign ( ) in Java

In Java, there are two types of plus sign ( ) operator Usage:

1. Arithmetic operator

• When used for two numbers, it represents addition operation.
• For example: int sum = 10 20; will add 10 and 20 and store the result (30) in the sum variable.

2. Unary increment operator

• When used for variables, it means to increment the variable value.
• It is a postfix increment operator, which means it returns the value of a variable after incrementing its value.
• For example: int count = 5; count ; will increment the value of count from 5 to 6, and then return 6.

Example:

<code class="java">int x = 10;
int y = ++x; // y = 11, x = 11

int z = y++; // z = 11, y = 12</code>

Note:

• The increment operator cannot be used for final variables. Because their values ​​cannot be modified.
• The increment operator can be used on Boolean values, which changes the Boolean value from false to true.

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