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JavaScript JavaScript Basics (Retired) Creating Reusable Code with Functions Variable Scope

Enemuo Felix
Enemuo Felix
1,895 Points
Posted by Enemuo Felix
Enemuo Felix
1,895 Points

Just really want to know if I'm on the same page with this

Does the alert function still access person = Lilah; without calling the callName(); function first ?

var person = George;
function callName () {
  person = Lilah;
}
alert(person);

Will the alert run George or Lilah?

Karolin Rafalski
Karolin Rafalski
11,368 Points
Karolin Rafalski
Karolin Rafalski
11,368 Points

The best way to do it is to test it! You can open up chrome developer tools by pressing command option i or choosing from the menu -> view -> developer -> JavaScript Console

Then copy paste the code in there. There are a lot of other ways to run JS code too! Just use the one you feel most comfortable with.

One thing is that George and Lilah should be strings, so you will need to wrap those in quotes.

Once you find out - write back what you got and let us know if it makes sense :-)

1 Answer

Enemuo Felix
Enemuo Felix
1,895 Points
Enemuo Felix
Enemuo Felix
1,895 Points

Thanks karolin. I actually did as you suggested and got George on a display dialog and also did another test but this time i introduced the callName(); function first before the alert (person); function and got Lilah on a dialog display. So i noticed by calling the callName(); function first before the alert that it cancel out the Global scope (George) and access the global without the var keyword. Like this

var person = George;
function callName () {
  person = Lilah;
}
callName ();
alert (person);

So this displayed Lilah