ldexp - multiply floating-point number by integral power of 2
Standard C Library (libc, -lc)
ldexp(double x, int exp);
The ldexp() function multiplies a floating-point number by an integral
power of 2.
The ldexp() function returns the value of x times 2 raised to the power
If the input x is a NaN, infinity, or 0.0, it is returned unchanged.
If the result would cause an overflow, the global variable errno is set
to ERANGE and infinity is returned, with the same sign as x.
If the result would cause underflow to 0.0, the global variable errno is
set to ERANGE and the value 0.0 is returned.
frexp(3), math(3), modf(3)
The ldexp() function conforms to ANSI X3.159-1989 (``ANSI C'').
BSD August 29, 1999 BSD
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