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NetBSD 6.1.5 - man page for expf (netbsd section 3)

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EXP(3)				   BSD Library Functions Manual 			   EXP(3)

NAME
     exp, expf, exp2, exp2f, expm1, expm1f, -- exponential functions

LIBRARY
     Math Library (libm, -lm)

SYNOPSIS
     #include <math.h>

     double
     exp(double x);

     float
     expf(float x);

     double
     exp2(double x);

     float
     exp2f(float x);

     double
     expm1(double x);

     float
     expm1f(float x);

DESCRIPTION
     The exp() and the expf() functions compute the base e exponential value of the given argu-
     ment x.

     The exp2(), and exp2f() functions compute the base 2 exponential of the given argument x.

     The expm1() and the expm1f() functions computes the value exp(x)-1 accurately even for tiny
     argument x.

RETURN VALUES
     These functions will return the appropriate computation unless an error occurs or an argu-
     ment is out of range.  The functions exp() and expm1() detect if the computed value will
     overflow, set the global variable errno to ERANGE and cause a reserved operand fault on a
     VAX.

SEE ALSO
     math(3)

STANDARDS
     The exp() functions conform to ANSI X3.159-1989 (``ANSI C89'').  The exp2(), exp2f(),
     expf(), expm1(), and expm1f() functions conform to ISO/IEC 9899:1999 (``ISO C99'').

HISTORY
     The exp() functions appeared in Version 6 AT&T UNIX.  The expm1() function appeared in
     4.3BSD.

BSD					September 13, 2011				      BSD
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