Definition: string s = sprint(object x, integer asCh=false, maxlen=-1[, nest=0])
Description: The representation of x as a string of characters is returned.
This is exactly the same as print(fn, x[, asCh[, maxlen]]), except that the output is returned as a string, rather than being sent to a file or device.
x: can be any phix object. asCh: true: print eg 65 as 65'A', false: not top-level, -1: sticky false. maxlen: (desktop only) the maximum desired length in characters of the returned result.
Anything beyond this is indicated by a trailing "..", potentially in addition to the specified length.
See the technicalia for more details and the nest parameter.

Most calls would probably only provide the first and maybe second parameter.
pwa/p2js: Supported. No maxlen or nest parameters (as yet, see below).
Comments: The atoms contained within x will be displayed to a maximum of 10 significant digits, just as with print().

An asCh of false means that sprint(65) yields "65" whereas sprint({65,66,67}) yields "{65'A',66'B',67'C'}" and the same for %v in (s)printf() and the ? shorthand. The %V format specifies a -1 for asCh. The presence of the string type makes asCh=true handling less necessary (than Eu) in Phix, except for debugging, where eg {97'a',98'b',"c"} may make it easier for you to realise your mistake than {97,98,"c"} would, or indeed spot such a value as being erroneous in the first place.
s = sprint(12345)                       -- s is "12345"
s = sprint({1,2.5,"hello",{4,5.5}})     -- s is `{1,2.5,"hello",{4,5.5}}`
s = sprint("hello")                     -- s is `"hello"`
s = sprint("hello"&-1)                  -- s is `{104’h’,101’e’,108’l’,108’l’,111’o’,-1}`
s = sprint("hello"&-1,-1)               -- s is `{104,101,108,108,111,-1}`
Implementation: See builtins\VM\pprntfN.e (an autoinclude) for details of the actual implementation. (Moved/merged from psprintN.e in 0.8.2)
See Also: print, sprintf, value, get