javascript - Check if character is number?

Question

I need to check whether justPrices[i].substr(commapos+2,1).

The string is something like: "blabla,120"

In this case it would check whether '0' is a number. How can this be done?

Answer 1

You could use comparison operators to see if it is in the range of digit characters:

var c = justPrices[i].substr(commapos+2,1);
if (c >= '0' && c <= '9') {
    // it is a number
} else {
    // it isn't
}