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Added docs for pi.f, corrected pi's contract, added examples

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This commit is contained in:
Neil Toronto 2012-06-21 10:21:21 -06:00
parent 3ef7aa2a45
commit 25c5e87929
1 changed files with 20 additions and 5 deletions
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25
collects/scribblings/reference/numbers.scrbl
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@ -1011,10 +1011,25 @@ is little-endian.}
@note-lib[racket/math]
@defthing[pi real?]{
@defthing[pi flonum?]{
An approximation to the ratio of a circle's circumference to its
diameter: @number->string[pi].}
An approximation of π, the ratio of a circle's circumference to its
diameter.
@examples[
#:eval math-eval
pi
(cos pi)
]}
@defthing[pi.f single-flonum?]{
Like @racket[pi], but in single precision.
@examples[
#:eval math-eval
pi.f
(* 2.0f0 pi)
(* 2.0f0 pi.f)
]}
@defproc[(degrees->radians [x real?]) real?]{
@ -1109,11 +1124,11 @@ Hence also:
@defproc[(nan? [x real?]) boolean?]{
Returns @racket[#t] if @racket[x] is @racket[eqv?] to @racket[+nan.0] or @racket[+nan.f], @racket[#f] otherwise.}
Returns @racket[#t] if @racket[x] is @racket[eqv?] to @racket[+nan.0] or @racket[+nan.f]; otherwise @racket[#f].}
@defproc[(infinite? [x real?]) boolean?]{
Returns @racket[#t] if @racket[z] is @racket[+inf.0], @racket[-inf.0], @racket[+inf.f], @racket[-inf.f]; @racket[#f] otherwise.}
Returns @racket[#t] if @racket[z] is @racket[+inf.0], @racket[-inf.0], @racket[+inf.f], @racket[-inf.f]; otherwise @racket[#f].}
@; ----------------------------------------------------------------------
@close-eval[math-eval]