2 display - set and/or return decimal digits for displaying numbers
13 When given an argument, this function sets the maximum number of
14 digits after the decimal point to be printed in real or exponential
15 mode in normal unformatted printing (print, strprint, fprint) or in
16 formatted printing (printf, strprintf, fprintf) when precision is
17 not specified. The return value is the previous display digit value.
19 When given no arguments, this function returns the current
32 The display digit value does not change the stored value of a number.
33 It only changes how a stored value is displayed.
35 Where rounding is necessary to display up to d decimal places,
36 the type of rounding to be used is controlled by config("outround").
39 > print display(), 2/3
40 20 ~0.66666666666666666667
42 > print display(40), 2/3
43 20 ~0.6666666666666666666666666666666666666667
45 > print display(5), 2/3