| EXP(3) | Library Functions Manual | EXP(3) | 
exp, expf,
  exp2, exp2f,
  expm1, expm1f —
#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);
exp() and expf() functions
  compute the base e exponential value of the given
  argument x.
The exp2() and
    exp2f() functions compute the base 2 exponential of
    the given argument x.
The expm1() and
    expm1f() functions compute the value exp(x)-1
    accurately even for tiny argument x.
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.
exp() function conforms to ANSI
  X3.159-1989 (“ANSI C89”). The
  exp2(), exp2f(),
  expf(), expm1(), and
  expm1f() functions conform to ISO/IEC
  9899:1999 (“ISO C99”).
exp() functions appeared in
  Version 1 AT&T UNIX. The
  expm1() function appeared in
  4.3BSD.
| September 2, 2019 | NetBSD 9.3 |