How to round floating point error in javascript

How to round floating poi开发者_如何学JAVAnt error in javascript?

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use toFixed to round it then convert it back to a number

var num = 1.00000000000000002341;
alert(+num.toFixed(10));

DEMO

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To round towards 0 to get a 32 bit signed integer, use x | 0.

There's also the Math.round function which rounds towards the closest integer.

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You could use Math.round(number * 1E6) / 1E6 to round up to 6 decimal places.