what_are_the_function_parameter_rules.md

What are the function parameter rules

What are the function parameter rules?

• Function parameters are the variables listed in a function's declaration.
• JavaScript functions can have default parameters.
• Parameters are passed in the order they are listed.
• A function can accept any number of arguments, but the excess arguments will be ignored unless using the ...rest parameter.

Example:

function greet(name = 'Guest') {
  console.log('Hello, ' + name);
}
greet(); // 'Hello, Guest'
greet('John'); // 'Hello, John'

Tags: basic, JavaScript, functions

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