annuity man page on HP-UX

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annuity(3M)							   annuity(3M)

NAME
       annuity(),  annuityf(),	annuityl(),  annuityw(),  annuityq() - present
       value factor for annuity

SYNOPSIS
DESCRIPTION
       The function computes the present value factor for an annuity:

	      (1 - (1 + rate) ** (-periods)) / rate

       is a version of it takes arguments and returns a result.

       is a version of it takes arguments and returns a result.

       is an version of it takes arguments and returns an result.

       is equivalent to on HP-UX systems.

USAGE
       To use these functions, compile either with the default option or  with
       the  and options.  To use compile with the option.  Make sure your pro‐
       gram includes Link in the math library by specifying on the compiler or
       linker command line.

RETURN VALUE
       If periods equals zero, returns 0.0.

       Else, if rate equals zero, returns periods.

       Else, if either argument is a NaN, returns a NaN.

       Else, if rate < -1, returns a NaN and raises the invalid exception.

       Else, if rate = -1 and periods = +INFINITY, returns +INFINITY.

       Else, if rate equals -1 and periods > 0, is equivalent to

       Else, if rate equals -1, returns -1.

       Else, if rate equals +INFINITY and periods >= 0, returns +0.0.

       Else, if rate equals +INFINITY and -1 < periods < 0, returns -0.0.

       Else, if rate equals +INFINITY and periods = -1, returns -1.

       Else, if rate equals +INFINITY, returns -INFINITY.

       Else, if periods is infinite and (rate * periods) > 0, is equivalent to

       Else, if periods is infinite, returns periods.

       returns	a  properly signed infinity in lieu of a value whose magnitude
       is too large, and raises the overflow and inexact exceptions.

       raises the underflow and inexact exceptions whenever a result  is  tiny
       (essentially  denormal  or  zero) and thereby suffers loss of accuracy,
       and may raise those exceptions if the result is merely tiny.

ERRORS
       No errors are defined.

SEE ALSO
       compound(3M), exp(3M), expm1(3M), pow(3M), math(5).

STANDARDS CONFORMANCE
       These functions are not specified by any standard.

			   HP Integrity Server Only		   annuity(3M)
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