Check that variable is a number

Question

How can I check that a variable is a number, either an integer or a string digit?

In PHP I could do:

if (is_int($var)) {
    echo \'$var is integer\'         


        

Answer 1

You should use:

if(Number.isInteger(variable))
   alert("It is an integer");
else
   alert("It is not a integer");

you can find the reference in: Number.isInteger()