How can I identify kind of variable I'm trying to compare in JavaScript?

Question

How to identify kind of varible, I'm trying to compare in JavaScript? I just have always the same problems in JavaScript with the kind of varibles, like

• int
• String
• boolean
• float
• object

so many times i have to use

• Boolean(String) - to boolean variable
• Number(String) - to int or float varible
• String.toString() - to String variable

the problem is when I use to compare [(value==true)], when the variable is not boolean or when I try to compare with others values [(value==varible)]

so there is a way to know what kind of variable is? a way to know the type of value

Answer 1

User Himal say use typeof.. so I can found the answer

var myvar=5
alert(typeof myvar);
 //alerts "number"

so to know kind of varible use typeof

source : http://www.javascriptkit.com/javatutors/determinevar2.shtml