HP-UX Reference (11i v1 00/12) - 3 Library Functions A-M (vol 6)

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STANDARD Printed by: Nora Chuang [nchuang] STANDARD
/build/1111/BRICK/man3/!!!intro.3c
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e
exp2(3M) exp2(3M)
NAME
exp2() - base-2 exponential function
SYNOPSIS
#include <math.h>
double exp2(double x);
DESCRIPTION
exp2() returns 2
x
.
The ISO/ANSI C committee has approved the exp2() function for inclusion in the C9X draft standard.
To use this function, compile either with the default -Ae option or with the -Aa and -D_HPUX_SOURCE
options. Make sure your program includes <math.h>. Link in the math library by specifying -lm on the
compiler or linker command line.
RETURN VALUE
If x is +INFINITY, exp2() returns +INFINITY.
If x is −INFINITY,
exp2() returns +zero.
If x is NaN,
exp2() returns NaN.
If the correct value after rounding would be smaller in magnitude than MINDOUBLE, exp2() returns
zero.
If the magnitude of x is too large,
exp2() returns +INFINITY.
ERRORS
No errors are defined.
SEE ALSO
cbrt(3M), exp(3M), log(3M), pow(3M), sqrt(3M), math(5), values(5).
HP-UX Release 11i: December 2000 − 1 − Section 3−−211
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