To round down towards zero (if the number can round to a 32-bit integer between -2147483648 and 2147483647), use: rounded=number|0; To round down towards zero (for any number), use:

How can I round down a number in Javascript? 2. JavaScript rounding numbers. 179.

Mar 6, 2016 · Just negate the input and the output to Math.round: var result = -Math.round(-num); In more detail: JavaScript's Math.round has the unusual property that it rounds halfway cases towards positive infinity, regardless of whether they're positive or negative. So for example 2.5 will round to 3.0, but -2.5 will round to -2.0.

You can use Math.round() for rounding numbers to the nearest integer. Math.round(532.24) => 532 Also, you can use parseInt() and parseFloat() to cast a variable to a certain type, in this case integer and floating point.

How to get following inputs to bellow outputs Input 1.0789 10.350 1.7777 Output 1.07 10.35 1.77

This is the actual correct answer. I'd just add that for the specific discount scenario, the simplified code would be: var discount = Math.round(10000 * (1 - price / listprice)) / 100; @ChristopheRoussy, the example you provided is actually correct and this result is caused by the fact that base-2 floating point can't represent all base-10 decimals precisely.

May 14, 2014 · Using Javascript, I would like to round a number passed by a user to the nearest 10. For example, if 7 is passed I should return 10, if 33 is passed I should return 30.

Aug 6, 2011 · @martellalex: From the question, the OP wanted 43.333 to round to 43 but 43.5 to round to 44, which exactly matches ECMAScript's Math.round()'s behavior of rounding to nearest, and running exact half-integers towards positive infinity. –

Mar 28, 2019 · Effectively, I will actually need the number as a number and not a string but it has to be in the format 4 decimals and rounded down for a reason to be accepted by a certain function and be Less than 1.12346 so 4 decimals and that criteria will then be 1.1234.

Sep 5, 2009 · Math.round() will round to the nearest integer. In order to achieve decimal precision, you need to manipulate your numbers a bit: Multiply the original number by 10^x (10 to the power of x), where x is the number of decimal places you want. Apply Math.round() Divide by 10^x; So to round 5.11111111 to three decimal places, you would do this: