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JavaScript

Posted by Mahmoud Nasser
Mahmoud Nasser
5,507 Points

Difference between Function Scope and Block Scope

i would like to have a detailed difference between both please :)

2 Answers

Steven Parker
Steven Parker
243,318 Points
Steven Parker
Steven Parker
243,318 Points

Function scope means something is available anywhere in the function where it is declared. Block Scope means it is available only within the block (inside a pair of braces) where it is declared. For example:

function test() {
  if (true) {
    var func = 1;     // "var" gives function scope
    let block = 2;    // "let" gives block scope
    // here, func is 1 and block is 2
  }
  // here, func is still 1 but block is not defined
}

test();
// here, neither func or block is defined
Mahmoud Nasser
Mahmoud Nasser
5,507 Points

may i know how do you take these snippets ccoz i cant see an option for upload a piece of my code ??

Steven Parker
Steven Parker
243,318 Points
Steven Parker
Steven Parker
243,318 Points

The code is just copy/pasted in, using the instructions for code formatting in the Markdown Cheatsheet pop-up below the "Add an Answer" area. :arrow_heading_down:   Or you can watch this video on code formatting.

Mahmoud Nasser
Mahmoud Nasser
5,507 Points
Mahmoud Nasser
Mahmoud Nasser
5,507 Points

Thanks man i got it