converting between float <-> int in javascript

Question

I have a javascript program (running in jsdb which uses Mozilla Spidermonkey 1.8, not in a browser) that I need to convert float and doubles to/from the appropriate number of bytes of their IEEE representations. Java has Float.floatToIntBits() and Float.intBitsToFloat() and similar methods for Double.

Is there a way to compute these functions in Javascript? (and yes, I know that all javascript numbers are essentially of type double)

I guess I could follow the algorithms in the javadoc for Double.longBitsToDouble() and Float.intBitsToFloat() but that only covers one direction, and I need both.

possible duplicate of [javascript float from/to bits](http://stackoverflow.com/questions/2003493/javascript-float-from-to-bits) — Jason S, Mar 17 '11 at 14:41
Possible duplicate of [javascript float from/to bits](https://stackoverflow.com/questions/2003493/javascript-float-from-to-bits) — phuclv, Aug 15 '18 at 16:38

score 4 · Answer 1 · edited May 23 '17 at 12:11

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javascript float from/to bits

From the answer: IEEE-754 Floating-Point Conversion

edited May 23 '17 at 12:11

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answered Mar 17 '11 at 14:28

JaredMcAteer

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Just took a look at the Javascript in the babbage.cs.qc.edu site -- It may produce correct answers, and may work well on the online calculator, but it's horribly written & not suitable for reuse in my opinion. – Jason S Mar 17 '11 at 17:53

score 1 · Answer 2 · answered Mar 17 '11 at 14:35

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As i know, javascript doesn't have such native methods.

Here is some sort of things, you want to have. Please examine the source code: http://babbage.cs.qc.edu/IEEE-754/IEEE-754hex32.html

answered Mar 17 '11 at 14:35

Alexander Yezutov

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converting between float <-> int in javascript

2 Answers2