I'd like to round at most 2 decimal places, but only if necessary.  Input:  10 1.7777777 9.1   Output:  10 1.78 9.1   How can I do this in JavaScript?...

I have float numbers like 3.2 and 1.6.  I need to separate the number into the integer and decimal part. For example, a value of 3.2 would be split into two numbers, i.e. 3 and 0.2  Getting the integer portion is easy:  n = Math.floor(n);   But I a...

I need regex to validate a number that could contain thousand separators or decimals using javascript. Max value being 9,999,999.99 Min value 0.01 Other valid values: 11,111 11.1 1,111.11  INVALID values: 1111 1111,11 ,111 111,  I've searched a...

I just read on MDN that one of the quirks of JS's handling of numbers due to everything being "double-precision 64-bit format IEEE 754 values" is that when you do something like .2 + .1 you get 0.30000000000000004 (that's what the a...

I'm facing the following issue/behavior:  console.log(1234567892012.123456);   // 1234567892012.1234 console.log(12345678920123.123456);  // 12345678920123.123 console.log(123456789201234.123456); // 123456789201234.12   What is causing this? Are...

Requirement:   Convert input integer or decimal to an array and convert array of integers which may include a decimal to a number.  Restriction:   Do not use string methods or convert input or output to a string during the procedure (a self-imposed r...

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I am trying to convert a decimal value back to an RGB value.  Assuming that this is the formula for compiling the decimal value  c = r*(255*255)+g*255+b   (For example rgb(16,120,78) adds up to 1071078)  How would one solve r, g and b without any ...

I'm doing simple math in JavaScript using variables to represent the numbers. Here is an example of my code:  var ones = 0; var fives = 0; function results (){     _fives = (fives * 5);     var res = (_fives + ones);     document.innerHTML = res;...

I’m trying to format some numbers with jQuery. I would like to get the user’s regional settings for currency and number, in order to implement the correct format (obtain the decimal separator).  Is it possible to retrieve these parameters with jQ...