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JavaScript

when to use var and when not

var message = "hello" alert(message); message = "something" alert(message);

in the third line i didnt have to use var anymore... why? Is the word set as variable once it was used with var or is there something more to it that im missing.

2 Answers

Xavier Bass
PLUS
Xavier Bass
Courses Plus Student 2,246 Points

var message = " " ; (var) is like a box . (message) is the name you give the box. inside that box you can put (or set equal =) anything you want

everytime (var) is used its like creating a new box to store stuff in hope makes sence lol

so basically everytime i use var its like creating new thing and that means once i create that thing i dont have to create it again and i can use it without var.... right ?

i think i get it now. Thank you