[SOLVED] It won't work so please help with it

JavaScript
1

Tell us what’s happening:
It isn’t working so please help because it says

oopsGlobal should be a global variable and have a value of 5

Your code so far


// Declare the myGlobal variable below this line
var myGlobal = 10;

function fun1() {
// Assign 5 to oopsGlobal Here
var oopsGlobal = 5
}

// Only change code above this line

function fun2() {
var output = "";
if (typeof myGlobal != "undefined") {
  output += "myGlobal: " + myGlobal;
}
if (typeof oopsGlobal != "undefined") {
  output += " oopsGlobal: " + oopsGlobal;
}
console.log(output);
}

Your browser information:

User Agent is: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_6) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/13.0.3 Safari/605.1.15.

Challenge: Global Scope and Functions

2 
// Declare the myGlobal variable below this line

var myGlobal = 10;

var oopsGlobal

function fun1() {

  // Assign 5 to oopsGlobal Here

var oopsGlobal = 5

}

// Only change code above this line

function fun2() {

  var output = "";

  if (typeof myGlobal != "undefined") {

    output += "myGlobal: " + myGlobal;

  }

  if (typeof oopsGlobal != "undefined") {

    output += " oopsGlobal: " + oopsGlobal;

  }

  console.log(output);

}
3

To declare a global variable inside of a function you must omit “var”.

For example:

// Declare the myGlobal variable below this line
var myGlobal = 10;

function fun1(){
// Assign 5 to oopsGlobal here
oopsGlobal = 5;
}

When you declare a variable inside of a function using “var”, it automatically makes the variable local to that function. When you omit “var” the variable is global in scope.

4

Protip: You do not want to declare global variables inside of a function. Just don’t. I believe that these challenges go on to show why this gets messy.

1 Like
5