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exp2(3m) [opensolaris man page]

exp2(3M)						  Mathematical Library Functions						  exp2(3M)

NAME
exp2, exp2f, exp2l - exponential base 2 functions SYNOPSIS
c99 [ flag... ] file... -lm [ library... ] #include <math.h> double exp2(double x); float exp2f(float x); long double exp2l(long double x); DESCRIPTION
These functions compute the base-2 exponential of x. RETURN VALUES
Upon successful completion, these functions return 2^x. If the correct value would cause overflow, a range error occurs and exp2(), exp2f(), and exp2l() return the value of the macro HUGE_VAL, HUGE_VALF, and HUGE_VALL, respectively. If x is NaN, a NaN is returned. If x is +-0, 1 is returned. If x is -Inf, +0 is returned. If x is +Inf, x is returned. ERRORS
These functions will fail if: Range Error The result overflows. If the integer expression (math_errhandling & MATH_ERREXCEPT) is non-zero, the overflow floating-point exception will be raised. USAGE
An application wanting to check for exceptions should call feclearexcept(FE_ALL_EXCEPT) before calling these functions. On return, if fetestexcept(FE_INVALID | FE_DIVBYZERO | FE_OVERFLOW | FE_UNDERFLOW) is non-zero, an exception has been raised. An application should either examine the return value or check the floating point exception flags to detect exceptions. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Interface Stability |Standard | +-----------------------------+-----------------------------+ |MT-Level |MT-Safe | +-----------------------------+-----------------------------+ SEE ALSO
exp(3M), feclearexcept(3M), fetestexcept(3M), isnan(3M), log(3M), math.h(3HEAD), attributes(5), standards(5) SunOS 5.11 12 Jul 2006 exp2(3M)

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exp(3M) 						  Mathematical Library Functions						   exp(3M)

NAME
exp, expf, expl - exponential function SYNOPSIS
c99 [ flag... ] file... -lm [ library... ] #include <math.h> double exp(double x); float expf(float x); long double expl(long double x); DESCRIPTION
These functions compute the base-e exponential of x. RETURN VALUES
Upon successful completion, these functions return the exponential value of x. If the correct value would cause overflow, a range error occurs and exp(), expf(), and expl() return HUGE_VAL, HUGE_VALF, and HUGE_VALL, respectively. If x is NaN, a NaN is returned. If x is +-0, 1 is returned. If x is +Inf, x is returned. For exceptional cases, matherr(3M) tabulates the values to be returned by exp() as specified by SVID3 and XPG3. See standards(5). ERRORS
These functions will fail if: Range Error The result overflows. If the integer expression (math_errhandling & MATH_ERREXCEPT) is non-zero, the overflow floating-point exception is raised. The exp() function sets errno to ERANGE if the result overflows. USAGE
An application wanting to check for exceptions should call feclearexcept(FE_ALL_EXCEPT) before calling these functions. On return, if fetestexcept(FE_INVALID | FE_DIVBYZERO | FE_OVERFLOW | FE_UNDERFLOW) is non-zero, an exception has been raised. An application should either examine the return value or check the floating point exception flags to detect exceptions. An application can also set errno to 0 before calling exp(). On return, if errno is non-zero, an error has occurred. The expf() and expl() functions do not set errno. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Interface Stability |Standard | +-----------------------------+-----------------------------+ |MT-Level |MT-Safe | +-----------------------------+-----------------------------+ SEE ALSO
feclearexcept(3M), fetestexcept(3M), isnan(3M), log(3M), math.h(3HEAD), matherr(3M), mp(3MP), attributes(5), standards(5) SunOS 5.11 12 Jul 2006 exp(3M)
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