Question

I’m displaying a text value and if by coincidence that text value happens to be numeric, then JavaScript displays it with a decimal .0.

Q: How do I write:

if (X is numeric) {
   $('#Status').text(+X);
} else {
   $('#Status').text(X);
}

Answer 1

You can use typeof to determine the type of value that a variable stores:

if (typeof(X) == 'number') {
   $('#Status').text(+X);
} else {
   $('#Status').text(X);
}

The cool thing about typeof is that it always returns a string so even if the variable you are checking is not set you will just get the string undefined.

Here are some good docs for typeof: https://developer.mozilla.org/en/JavaScript/Reference/Operators/typeof