math.frexp
Break number into mantissa and exponent
Prototype
m, n = math.frexp (v)Description
The frexp function breaks down the floating-point value (v) into a mantissa (m) and an exponent (n), such that the absolute value of m is greater than or equal to 0.5 and less than 1.0, and v = m * 2^n.
Note that math.ldexp is the inverse operation.
Note that math.ldexp is the inverse operation.
m, n = math.frexp (1.23456e24)
print (m) --> 0.51060204851673
print (n) --> 81
print ( 0.51060204851673 * 2^81 ) --> 1.23456e+024
Lua functions
- math.abs - Absolute value
- math.acos - Arc cosine
- math.asin - Arc sine
- math.atan - Arc tangent
- math.atan2 - Arc tangent of v1/v2
- math.ceil - Next higher integer value
- math.cos - Cosine
- math.cosh - Hyperbolic cosine
- math.deg - Convert from radians to degrees
- math.exp - Raises e to a power
- math.floor - Next smaller integer value
- math.fmod - The modulus (remainder) of doing: v1 / v2
- math.huge - A huge value
- math.ldexp - Compute m* 2^n
- math.log - Natural log
- math.log10 - Log to the base 10
- math.max - The highest of one or more numbers
- math.min - The lowest of one or more numbers
- math.modf - Returns the integral and fractional part of its argument
- math.pi - The value of pi
- math.pow - Raise a number to a power
- math.rad - Convert degrees to radians
- math.random - Generate a random number
- math.randomseed - Seeds the random number generator
- math.sin - Sine
- math.sinh - Hyperbolic sine
- math.sqrt - Square root
- math.tan - Tangent
- math.tanh - Hyperbolic tangent
Topics
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