What does = mean in java

The "=" operator in the Java programming language is used to assign a value to a variable and store the value on the right side of the expression in the variable on the left. Usage: variable = expression, where variable is the name of the variable that receives the assignment, and expression is the code segment that calculates or returns the value.

Meaning of = in Java

In the Java programming language, the = operator is used to assign values ​​to variables. It stores the value on the right side of the expression in the variable on the left side.

Semantics

Variable = expression

Where:

• Variable : The variable name that receives the assigned value.
• Expression: Code segment that calculates or returns a value.
• =：Assignment operator.

Usage

int age = 25; // 变量 age 赋值为 25
String name = "John Doe"; // 变量 name 赋值为 "John Doe"

Type Compatibility

Variables and expressions must be type-compatible. If you try to assign an incompatible type to a variable, a compile-time error occurs. For example:

int age = "25"; // 编译错误：不能将字符串赋值给 int 变量

Multiple assignment

Java allows you to use one assignment statement to assign values ​​to multiple variables:

int age = 25, year = 2023; // 给 age 和 year 赋值

Notes

• = operator is right associative, which means the right operand of the expression is evaluated first.
• = operator does not return any value.
• The assignment operator is different from the equality operator (==). == is used to compare values, while = is used to assign values.

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