exp, expf, expl - base-e exponential function

       For an explanation of the terms used in this section, see attributes(7).
       ┌─────────────────────────────────────────────────────────────────────────────┬───────────────┬─────────┐
       │ Interface                                                                   │ Attribute     │ Value   │
       ├─────────────────────────────────────────────────────────────────────────────┼───────────────┼─────────┤
       │ exp(), expf(), expl()                                                       │ Thread safety │ MT-Safe │
       └─────────────────────────────────────────────────────────────────────────────┴───────────────┴─────────┘

       These functions return the value of e (the base of natural logarithms) raised to the power of x.

       See math_error(7) for information on how to determine whether an error has occurred  when  calling  these
       functions.

       The following errors can occur:

       Range error, overflow
              errno is set to ERANGE.  An overflow floating-point exception (FE_OVERFLOW) is raised.

       Range error, underflow
              errno is set to ERANGE.  An underflow floating-point exception (FE_UNDERFLOW) is raised.

       C99, POSIX.1-2001.

       The variant returning double also conforms to SVr4, 4.3BSD, C89.

       Math library (libm, -lm)

       exp, expf, expl - base-e exponential function

       On success, these functions return the exponential value of x.

       If x is a NaN, a NaN is returned.

       If x is positive infinity, positive infinity is returned.

       If x is negative infinity, +0 is returned.

       If the result underflows, a range error occurs, and zero is returned.

       If  the  result  overflows,  a  range  error  occurs,  and the functions return +HUGE_VAL, +HUGE_VALF, or
       +HUGE_VALL, respectively.

cbrt(3), cexp(3), exp10(3), exp2(3), expm1(3), sqrt(3)

Linux man-pages 6.9.1                              2024-05-02                                             exp(3)

       C11, POSIX.1-2008.

#include<math.h>doubleexp(doublex);floatexpf(floatx);longdoubleexpl(longdoublex);

   Feature Test Macro Requirements for glibc (see feature_test_macros(7)):

       expf(), expl():
           _ISOC99_SOURCE || _POSIX_C_SOURCE >= 200112L
               || /* Since glibc 2.19: */ _DEFAULT_SOURCE
               || /* glibc <= 2.19: */ _BSD_SOURCE || _SVID_SOURCE