Round off decimals easily?

[flesh]

As the title, is there a class method in Flash to limit and round of a number's decimals ?
Like :
roundToTwoDecimals(1.2362 ) = 1.24
Thanks in advance fellow flashers!

[BradLee]

Just multiply the number by 10 * the number of decimal places you want to round to, use Math.round, and then divide by the same number... sorta like this:



var tNum:Number = 1.2362 * 100; // equals 123.62
tNum = Math.round(tNum); // gives you 124
tNum = tNum / 100; //gives you 1.24

[mathew.er]

There is no function to do that I think... you can try writing on though

function round ( value : Nuber, decimalPlaces : int ) : Number
{
var k : int = Math.pow ( 10, decimalPlaces );

value *= k;
value = Math.round ( value );

return value / k;
}// edit : I should have refreshed the page first :D

[flesh]

Thanks! both of you!
Slick solution mathew.er ! now I understand the Math.pow too

[Krilnon]

See also: http://www.kirupa.com/forum/showpost.php?p=2057944&postcount=19

[TheCanadian]

The Number class in AS3 has a built in method for rounding numbers to a certain decimal place.

var num:Number = 1.2362;
trace(num.toFixed(2)); //1.24

Note, however, that toFixed returns a String and thus if you want to use the returned value in some mathematical operation, you will have to convert it back to a Number.

[flesh]

Even better!
Thanks!

[tedc]

Even better!
Thanks!

This is super helfpul, but for anyone who stumbled across this in the searches, remember this function returns a STRING not a number so typically you will want to cast like so:



var tempNum:Number = 1.1268;
trace(Number(tempNum.toFixed(3)));

[tedc]

just realized like 8 months after this post that the Canadian had already advised on this functions return value as a string : / duh!