Variable
holds a value. Following are some of the examples of variables.
var name =
"Krishna"
var id=123
Above
statements define two variables name, id. ‘var’ keyword is used to define
variables.
Naming constraints
a. Variable name must begin with any
alphabet, _ (or) $.
b. Variable name can contain any
character.
c. Spaces are not allowed in between
variable names.
d. Don’t use Javascript keywords as
variable names.
e. Variable names are case sensitive.
Name, NAme, name are 3 different variables.
variables.html
<!DOCTYPE html> <html> <head> <title>Variables</title> </head> <body> <script type="text/javascript"> var name = "Krishna"; var id=123; document.write("name = " + name + "<br />"); document.write("id = " + id); </script> </body> </html>
Note
Java
script is case sensitive, so the names banana, Banana, BaNaNa are three
different variables.
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