rounding numbers

[tinkler]

Is it possible to round numbers to a given number of decimal places in JavaScript? Math:Round() seems to only round to whole numbers. Maybe something similar to a classical 'trim' method would do the trick, but I can't find anything that would do the job....??

 

[petey]

Here is how I do this type of stuff:

// round to the nearest tenth

function roundToTenth(numb) {
var ten_x_numb = numb * 10;
var round_numb = Math.round(ten_x_numb) / 10;
return round_numb;
}

 

[petey]

Here's a more flexible way:

function round(numb, decimalPlaces) {
var multiplier = Math.pow(10, decimalPlaces);
var multipliedNumb = numb * multiplier;
var roundNumb = Math.round(multipliedNumb) / multiplier;
return roundNumb;
}

You can specify how many decimal places, even negative decimal places, which begin to do rounding to the tens, hundreds, etc.

 

[starway]

Read this: thread216-205191