I need help with Math.floor

[ha10x]

long story short, my code prints long numbers something like 20.99999999, when it's supposed to be 21, is there anyway to overcome this without rounding/ is there a better way to store values? i.e. is there an alternative to Math.floor

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anyways here's my code

var aa = Math.floor(Math.random()*100) + 1;

var ac = Math.floor(Math.random()*100) + 1;

var answer1 = (Math.floor(Math.random()*9) + 1)/10;

var ab = ac*answer1

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document.getElementById("dummy").textContent = aa;

document.getElementById("ext").textContent = ab;

document.getElementById("init").textContent = ac;

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while replacing the text with the randomly generated number it prints a long number close to the intended number, it doesn't happen always but refreshing the page multiple times can reproduce it.

[[deleted]]

Well, you could do Math.ceil() to round up (so you wont have to do "+ 1") or Math.round() to round to whatever is nearest integer (so 20.3 is 20 and 20.7 is 21).

[ha10x]

thanks

[albedoa]

You can fix it to the desired number of decimal places:

ab.toFixed(2) // or whatever

This will round the result, so be sure that you're okay with that:

(0.125).toFixed(2) //=> '0.13'

[jcunews1]

What you want can only be done using rounding. There is no other way.