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.

(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.