Difference between revisions of "Math.ldexp"
From GiderosMobile
m (Text replacement - "</source>" to "</syntaxhighlight>") |
|||
| (3 intermediate revisions by 2 users not shown) | |||
| Line 4: | Line 4: | ||
=== Description === | === 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) | (number) = math.ldexp(v1,v2) | ||
| − | </ | + | </syntaxhighlight> |
| + | |||
| + | Returns v1*2^v2. | ||
=== Parameters === | === Parameters === | ||
| − | '''v1''': (number) | + | '''v1''': (number) a floating point value<br/> |
| − | '''v2''': (number) | + | '''v2''': (number) an exponent<br/> |
=== Return values === | === Return values === | ||
| − | '''Returns''' (number) result<br/> | + | '''Returns''' (number) the load exponent result<br/> |
| + | |||
| + | === 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 | ||
| + | </syntaxhighlight> | ||
| + | |||
| + | === Note === | ||
| + | [[math.frexp]] is the inversed operation. | ||
{{Math}} | {{Math}} | ||
Latest revision as of 15:30, 13 July 2023
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
- Math.abs
- Math.acos
- Math.asin
- Math.atan
- Math.atan2
- Math.ceil
- Math.clamp
- Math.cos
- Math.cosh
- Math.cross
- Math.deg
- Math.distance
- Math.distances
- Math.dot
- Math.edge
- Math.exp
- Math.fft
- Math.floor
- Math.fmod
- Math.frexp
- Math.ifft
- Math.inside
- Math.ldexp
- Math.length
- Math.log
- Math.log10
- Math.max
- Math.min
- Math.modf
- Math.nearest
- Math.noise
- Math.normalize
- Math.pow
- Math.rad
- Math.random
- Math.randomseed
- Math.raycast
- Math.round
- Math.sign
- Math.sin
- Math.sinh
- Math.sqrt
- Math.tan
- Math.tanh
