Question

Possible Duplicate:
Addition turns into concatenation

Here’s what I have…

    var srate = Math.round(princ * intr * term * 100) / 100; //works fine
    var dasvalue = princ + srate; //doesn't work
    document.calc.pay.value = dasvalue;

The “var dasvalue = princ + srate;” adds the two sums up as strings.

100 + 1.4 = 1001.4

What am I doing wrong?

Answer 1

You can use the unary plus operator to cast to type Number, ensuring addition rather than concatenation:

var dasvalue = +princ + +srate;