expm1d64(3M)expm1d64(3M)NAMEexpm1d64(), expm1d128(), expm1d32() - decimal exponential minus 1 func‐
tions
SYNOPSISDESCRIPTION
The function is equivalent to but may be more accurate for very small
values of x.
The and functions are useful to guarantee that financial calculations
of (((1+x)**n)-1)/x are accurate when x is very small, namely:
The preceding example might be applicable when calculating small daily
interest rates.
is a version of it takes a argument and returns a result.
is a version of it takes a argument and returns a result.
These math functions are supported for HP-UX 11i Version 3 September
2008 Update and forward.
USAGE
To use any of these functions, compile with the option.
Make sure your program defines and then includes
Link in the math library by specifying or on the linking command line.
For more information, see the at the following site:
RETURN VALUE
If x is +infinity, returns +infinity.
If x is −infinity, returns -1.
If x is NaN, returns a quiet NaN.
returns +infinity (or, in some non-default rounding direction modes,
the maximum finite number) in lieu of a value whose magnitude is too
large, and raises the overflow and inexact exceptions.
raises the underflow exception whenever a result is tiny (essentially
subnormal or zero) and inexact.
raises the inexact exception whenever a rounded result does not equal
the mathematical result.
ERRORS
If the correct value would overflow, sets to
SEE ALSOannuity(3M), cbrtd64(3M), compound(3M), exp10d64(3M), exp2d64(3M),
expd64(3M), log1pd64(3M), powd64(3M), sqrtd64(3M), math(5).
STANDARDS CONFORMANCE
These functions conform to ISO/IEC TR 24732, "Extension for the pro‐
gramming language C to support decimal floating-point arithmetic".
HP Integrity Server Only expm1d64(3M)
