How to create variable name dynamically?

how to create variable name dynamically?
eg: if (test==1)
var test1=1
if (test==2)
var test2=2

here test1 and test2 should create dynamically.
i tried

var “test”+1.
But throws error.
Any idea?

Have a look at the following jsFiddle on how to accomplish this.

thank you very much for your help.it worked.