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I have a js that grabs values, multiplies, sums, divides, and then puts them in a cell of a table. The result can be up to (I think) 15 decimal places. How do I limit it to two?

ex.: Result of math operation: 5.223567 I want: 5.22

I want to truncate or round the remaining decimal places. I am open to solutions that requires resources outside of js but would prefer a js solution if one exists.

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16

Use .toFixed.

yourNumber.toFixed(2);

Notice that .toFixed will return a string, as JavaScript uses 64 bit floating point numbers which cannot guarantee accuracy. (In layman's terms, JS cannot represent 0.1 accurately so it has to return a string.)

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2 Comments

Nice explanation of why toFixed returns a string.
He didn't say he wanted a string though.
6 
 (5.223567).toFixed(2)

the method toFixed rounds to a number of decimals.

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4 Comments

why downvote when the answer is perfectly valid. Even no comment explaining why this is perceived incorrect.
Trivial questions with easily discoverable dupes are asked a lot in this tag. Users get tired of it, and downvote answers to these questions. There's more info over on Meta Stack Overflow, if you search for it.
I understand, will try to add comment to the trivial questions ;) instead of an answer.
It'll probably save you downvotes in the future. Good luck.
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If you do not want to use .toFixed() you could also

Math.round(num * Math.pow(10,x)) / Math.pow(10,x)

where x is the number of decimal places and num is the original number

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