Webscript Functions (1 Viewer)

[x.MBM]

• Functions allow reusing code by grouping statements.
• Defined with function keyword:
  function greet() { console.log("Hello"); }
• Calling executes the code:
  greet(); // logs "Hello"
• Can accept parameters:
  function sum(a, b) { return a + b; }
  let total = sum(10, 20); //total = 30
• Parameters act as function variables.
• Return keyword sends back a value.
• Scope:
  • Functions have local scope
  • Variables inside not accessible globally
• Some built-in functions:
  • Number/String functions
  • encodeURI()
  • setTimeout()
  • Math functions
• User defined vs built-in functions
• Function expressions and arrow functions
• Explain calling context, hosting

The goal is to explain how to define reusable functions, pass parameters, return values from them and use scope. Include built-in and custom function examples.

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