functions

JavaScript - Functions

Functions are used to organise the code into separate meaningful blocks to maintain and debug easily.

• Syntax of functions:

  function nameOfFunction(parameters) {
      //statements
  }
  nameOfFunction(arguments) //calling function

• Function declaration:

  function greet(avenger) {
      return `Hello, ${avenger}`
  }
  greet("ironman")

• Function Expression:

  const greet = function(avenger) {
      return `Hello, ${avenger}`
  }
  greet("ironman")

• Default Parameters:

  const greet = function(avenger = "ironman") {
      return `Hello, ${avenger}`
  }
  greet()

• Functions vs Methods

  • Functions does not specific to any objects.
  • Methods are specific to objects.