Maximum integer range of Number

Question

We are doing some maths with large integers in Actionscript 3. Because there is no long type, we are using Number.

What's the range of consecutive integers (positive to negative) a Number can accurately represent before it starts to veer into floating point errors?

The Number data type can use up to 53 bits to represent integer values http://help.adobe.com/en_US/FlashPlatform/reference/actionscript/3/Number.html — The_asMan, Sep 13 '13 at 14:35

score 5 · Accepted Answer · answered Sep 13 '13 at 15:00

ActionScript® 3.0 Reference for the Adobe® Flash® Platform states that the Number data type adheres to the double-precision IEEE-754 standard. In IEEE-754 double-precision, there are 64 bits in use (1 for sign bit, 11 bits for exponent and 52 bits for fraction).

Therefor maximum integer range should be approximately ±1.7976931348623157×(10^308)

See Also MAX_VALUE and MIN_VALUE in Number class.

score 1 · Answer 2 · edited May 23 '17 at 11:50

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To answer the original question, when not using a floating point representation the integer range is up to 2⁵³-1 (the sign is in a different bit). +/- 9007199254740991

source

edited May 23 '17 at 11:50

Community

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answered Feb 15 '16 at 17:54

Marcus Wilkinson

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Maximum integer range of Number

2 Answers2