How do I Convert NaN to a 0?

Question

When a value is not entered in one of my forms, it creates a later result of NaN in the javascript. I just want to declare anytime NaN would show that it would instead show 0. I thought that by simply adding

<script>

a = a || 0

</script>

to the beginning of my scripts that it would be fine.

Is there anyway to say that NaN will just always equal 0, no matter what the situation?

Answer 1

NaN is a global object that you cannot override.

Reference: https://developer.mozilla.org/en-US/docs/JavaScript/Reference/Global_Objects/NaN

One alternative is to use isNaN then

a = isNaN(a) ? 0 : a;