Math.ldexp
From GiderosMobile
Available since: Gideros 2011.6
Class: math
Description
Used to multiply a floating point value v1 by the number 2 raised to the v2 power. This is called a load exponent. v2 should be an integer. <syntaxhighlight lang="lua"> (number) = math.ldexp(v1,v2) </source>
Returns v1*2^v2.
Parameters
v1: (number) a floating point value
v2: (number) an exponent
Return values
Returns (number) the load exponent result
Example
<syntaxhighlight lang="lua"> local m, n = math.frexp(16.4) print("mantissa", m, "exponent", n) print(m*2^n) local r = math.ldexp(0.5125, 5) print("load exponent result", r) -- 16.4 </source>
Note
math.frexp is the inversed operation.
- Math
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