Check type of varaiable in javascript

Check type of varaiable in javascript

In javascript, you can get the type of variable in javascript with this function:

typeof(var)

example:

var a = 1;

>> typeof(a)

• return number

var b = "hello";

>> typeof(b)

• return  string

var c = new Date();

>> typeof(c)

• return  object

the sample of useful of this:

var man = {"name":"tom", "age" : 12};

if you want to display it according their type in table.

By String should align left, and number align right.

var html_table='<table><tr>';

for (var each in man){

html_table+='<td>'+each+'</td><td align="'

if (typeof(man[each])=='number') html_table+='right';

else if (typeof(man[each])=='string') html_table+='left';

html_table += '">'+man[each]+'</td>';

 };

html_table+='</tr></table>';

after run, you will see the result like this

name	tom
age	12