What does i+ mean in java

i in Java is a postfix increment operator that increments the value of i by 1. It first returns the current value of i, then increments it and assigns it back to i. The difference from the prefix increment operator i is that i first returns the current value and then increments it, while i first increments and then returns.

i in Java

i in Java is a postfix increment operator , which increments the value of variable i by 1.

Grammar:

<code class="java">i++</code>

Working principle:

• First, i will Variable i is evaluated and its current value is returned.
• Then, it increments the value of i by 1.
• Finally, it assigns the incremented value back to i.

Example:

<code class="java">int i = 5;
System.out.println(i); // 输出 5

i++;
System.out.println(i); // 输出 6</code>

The difference between the prefix increment operator i:

• Suffix increment Operator i returns the current value of a variable before incrementing it, while prefix increment operator i increments a variable before returning its value.
• Therefore, in some cases this may lead to different results.

Note:

• i only applies to basic types (such as int and double) and String type variables.
• It cannot be used for reference types (such as objects).
• i is a unary operator, which means it can only act on one operand.

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