CODEWITHSUNDEEP
javascriptecmascript-5
blueblueskyhua
blueblueskyhua

Reputation: 19

When JavaScript maximum number length more than 16，what happen ？

look at this picture.(The underLine is input.)

error example

why the end of JavaScript Number with trailing zeros or a not predictable number？

I checked the document with https://www.ecma-international.org/ecma-262/5.1/#sec-9.7

But I can't find anything useful for this problem.

Upvotes: 0

Views: 965

Answers (2)

Roy
Roy

Reputation: 471

Numbers in Javascript use Double-precision floating-point format which can represent numbers from -(2^53 - 1) and (2^53 - 1). This limits the maximum safe number (Number.MAX_SAFE_INTEGER) to 9007199254740991.

Hence any number above that will be not be represented accurately.

Upvotes: 1

ashish singh
ashish singh

Reputation: 6914

so the thing is there is maximum integer which can be safely manipulated in javascript after that you are supposed to get some unexpected results based on implementation

read about that max safe integer https://www.ecma-international.org/ecma-262/6.0/#sec-number.max_safe_integer

BTW there is a new bigint type which can handle large numbers https://developers.google.com/web/updates/2018/05/bigint

bigint however is not a standard yet i think

Upvotes: 0

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