Difference between revisions of "Math.ldexp"
From GiderosMobile
| Line 17: | Line 17: | ||
=== Return values === | === Return values === | ||
'''Returns''' (number) the load exponent result<br/> | '''Returns''' (number) the load exponent result<br/> | ||
| + | |||
| + | === Example === | ||
| + | <source 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 === | === Note === | ||
Revision as of 09:57, 14 November 2022
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.
(number) = math.ldexp(v1,v2)
Returns v1*2^v2.
Parameters
v1: (number) a floating point value
v2: (number) an exponent
Return values
Returns (number) the load exponent result
Example
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
Note
math.frexp is the inversed operation.
- Math
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- Math.asin
- Math.atan
- Math.atan2
- Math.ceil
- Math.clamp
- Math.cos
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- Math.cross
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- Math.length
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