The exp() function computes the exponential of x, defined as e^x.

Upon successful completion, exp() returns the exponential of x.

If the correct value would cause overflow, exp() returns HUGE_VAL and sets errno to ERANGE.

If the correct value would cause underflow to zero, exp() returns 0 and may set errno to ERANGE.

If x is NaN, NaN is returned.

For exceptional cases, matherr(3M) tabulates the values to be returned as dictated by Standards other than XPG4.

The exp() function will fail if:

ERANGE

The result overflows.

The exp() function may fail if:

ERANGE

The result underflows.

An application wishing to check for error situations should set errno to 0 before calling exp(). If errno is non-zero on return, or the return value is NaN an error has occurred.

See attributes(5) for descriptions of the following attributes:

isnan(3M), log(3M), matherr(3M), mp(3MP), attributes(5), standards(5)

Prior to Solaris 2.6, there was a conflict between the pow function in this library and the pow function in the libmp library. This conflict was resolved by prepending mp_ to all functions in the libmp library. See mp(3MP) for details.