Converting a 'string number' to a number

Question

I'm creating a library and trying to send a string into the function and return it as a Number, while creating a conditional to determine if the string sent into the function is a number before I do the conversion.

var strNum = function(val){
    if (!isNan(val)){
        console.log('This is a string that can be converted')
        parseInt(val)
        return val
    }else{
        console.log ('This sting is not a "number"');
    }
};

This is what I have but when debugging it I get an error of "ReferenceError: isNan is not defined if (val = !isNan(val)){" and I'm not sure why its isn't working!

Any thoughts?

It's isNaN() (note the second upper-case N), not isNan(). — Anthony Grist
– Anthony Grist, Commented Mar 28, 2013 at 9:09

kannanrbk · Accepted Answer · 2013-03-28 09:10:19Z

6

it's isNaN not isNan.

There is no method named isNan in javascript that's why its throwing reference error.

answered Mar 28, 2013 at 9:10

kannanrbk

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