How does JavaScript determine the number of digits to produce when formatting floating-point values?

In JavaScript, everyone knows the famous calculation: 0.1 + 0.2 = 0.30000000000000004. But why does JavaScript print this value instead of printing the more accurate and precise 0.300000000000000044408920985006?...

I wanted to display a number to 2 decimal places. I thought I could use toPrecision(2) in JavaScript . However, if the number is 0.05, I get 0.0500. I'd rather it stay the same. See it on JSbin. What is the best way to do this? I can think...

if you type 78764357878563812 in chrome or in safari, then you get If you do for(var i = 0; i < 30; i++){console.log(i + " == " + 78764357878563800 + " ? ");console.log((78764357878563790+i) == 78764357878563800);} You start...

I am making a webpage that displays the digits of pi. I was able to get my pi variable to display 20 digits of pi using the toFixed method but I am wondering if I can display more. Is the number of decimal places limited by the memory size of my vari...

http://floating-point-gui.de/formats/binary/ binary can only represent those numbers as a finite fraction where the denominator is a power of 2 Does this mean that the numbers calculated by this process can all be added to each other or multipl...

I heard that you could right-shift a number by .5 instead of using Math.floor(). I decided to check its limits to make sure that it was a suitable replacement, so I checked the following values and got the following results in Google Chrome: 2.5 &g...

I'm new to JavaScript and just discovered toFixed() and toPrecision() to round numbers. However, I can't figure out what the difference between the two is. What is the difference between number.toFixed() and number.toPrecision()?...

I want to generate a really large random number. I don't need this number to be cryptographically secure. Hence, I'm not using crypto.getRandomValues. Currently, I'm generating the random number as follows: const random = length =>...

I am creating an online calculator using JavaScript. I have this to work out a calculation: eval(expression).toPrecision(10); This produces the right output in almost all cases. E.g. eval('456456+45646486*45646884').toPrecision(10) // Ou...

I am trying to create a form that adds up numbers to two decmial points. I.e. be able to add up 5.5 with 105.67 with 12.54 and get: 123.71 Here is as far as I've got, but when I try adding .toFixed(2) it either just does the inputs and not the...

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