#elisp
Function:
copysign x1 x2This function copies the sign of x2 to the value of x1 ,
and returns the result. x1 and x2 must be floating point.
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GNU Emacs Lisp Reference Manual: Float Basics the same as x .
If x is a NaN, then s is also a NaN.
If x is zero, then e is 0.
Function: ldexp sig &optional exp This function returns a floating-point number corresponding to the
significand sig and exponent exp .
<span>Function: copysign x1 x2 This function copies the sign of x2 to the value of x1 ,
and returns the result. x1 and x2 must be floating point.
Function: logb x This function returns the binary exponent of x . More
precisely, the value is the logarithm base 2 of |x|, rounded
down to an integer.
(logb 10)
⇒ 3
(logb Summary
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