How to truncate floating point number in jscript?

Question

How to truncate float value in Jscript?

eg.

var x = 9/6

Now x contains a floating point number and it is 1.5. I want to truncate this and get the value as 1

Answer 1

x = Math.floor(x)

This will round the value of x down to the nearest integer below.

Answer 2

Math.round() should achieve what you're looking for, but of course it'll round 1.5 to 2. If you always want to round down to the nearest integer, use Math.floor():

var x = Math.floor(9 / 6);

Answer 3

Math.floor() only works as the OP intended when the number is positive, as it rounds down and not towards zero. Therefore, for negative numbers, Math.ceil() must be used.

var x = 9/6;
x = (x < 0 ? Math.ceil(x) : Math.floor(x));

Answer 4

Another solution could be:

var x = parseInt(9 / 6);
Wscript.StdOut.WriteLine(x); // returns 1

the main purpose of the parseInt() function is to parse strings to integers. So I guess it might be slower than Math.floor() and methods as such.