freeCodeCamp/curriculum/challenges/en/02-javascript-algorithms-and-data-structures/basic-javascript/global-vs.-local-scope-in-functions.en.md

id, title, challengeType

id	title	challengeType
56533eb9ac21ba0edf2244c0	Global vs. Local Scope in Functions	1

Description

It is possible to have both local and global variables with the same name. When you do this, the local variable takes precedence over the global variable. In this example:

var someVar = "Hat";
function myFun() {
  var someVar = "Head";
  return someVar;
}

The function myFun will return "Head" because the local version of the variable is present.

Instructions

Add a local variable to myOutfit function to override the value of outerWear with "sweater".

Tests

- text: Do not change the value of the global <code>outerWear</code>
  testString: 'assert(outerWear === "T-Shirt", ''Do not change the value of the global <code>outerWear</code>'');'
- text: <code>myOutfit</code> should return <code>"sweater"</code>
  testString: 'assert(myOutfit() === "sweater", ''<code>myOutfit</code> should return <code>"sweater"</code>'');'
- text: Do not change the return statement
  testString: 'assert(/return outerWear/.test(code), ''Do not change the return statement'');'

Challenge Seed

// Setup
var outerWear = "T-Shirt";

function myOutfit() {
  // Only change code below this line
  
  
  
  // Only change code above this line
  return outerWear;
}

myOutfit();

Solution

var outerWear = "T-Shirt";
function myOutfit() {
  var outerWear = "sweater";
  return outerWear;
}