Javascript square root

Sorry, I'm still a novice at Javascript. I cannot manage to do a square root operation. I am using the coding:
var a = Math.sqrt(b);
Anyhelp would be appreciated. Thanks.

Looks fine to me as long as b is an integer. Try just typing

alert(Math.sqrt(9));

and see if it returns 3 to cut out the guesswork

david_kw

For some reason, putting it into an alert worked, and it also worked with a variable. Thanks a lot, David

b definitely does not have to be an integer, it can be any real number (ie loads of decimal places will work).

Dave