Keywords for defining functions in javascript

The keyword for defining functions in JavaScript is function, which is used to indicate that this is a function definition, including function name, optional parameters and function body. The function body contains the block of code to be executed, enclosed in curly braces. Function names must be unique, functions can be called by their names, and functions can have zero or more parameters.

Keywords for defining functions in JavaScript

In JavaScript, use the keyword function Define functions.

Format:

<code class="javascript">function functionName(parameter1, parameter2, ...) {
  // 函数体
}</code>

Details:

• function: Indicates this is A function definition.
• functionName: The name of the function, used to reference the function.
• parameter1, parameter2, ...: Optional function parameters, used to pass data to the function.
• Function body: Contains the code block to be executed. Code blocks are enclosed in curly braces {}.

Example:

<code class="javascript">function greet(name) {
  console.log("你好，" + name + "！");
}

greet("小明"); // 输出：你好，小明！</code>

Points:

• Function names must be unique.
• Function can have zero or more parameters.
• The code in the function body is executed when the function is called.
• Function can be called by its name.

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