ECHO: "-- comparing undef --"
ECHO: "undef is undef"
ECHO: "a is undef"
ECHO: "undef is a"
ECHO: "a is b"
WARNING: Ignoring unknown variable 'c' in file special-consts.scad, line 21
ECHO: "c is undef"
WARNING: Ignoring unknown variable 'c' in file special-consts.scad, line 25
ECHO: "undef is c"
WARNING: Ignoring unknown variable '$customSpecialVariable' in file special-consts.scad, line 29
ECHO: "$customSpecialVariable is undef"
ECHO: "-- comparing undef --"
ECHO: "undef evaluates false"
WARNING: Ignoring unknown variable 'c' in file special-consts.scad, line 40
ECHO: "undef evaluates false"
ECHO: "-- echo undef --"
ECHO: undef
WARNING: Ignoring unknown variable 'c' in file special-consts.scad, line 44
ECHO: undef
ECHO: "-- calculating with undef --"
WARNING: undefined operation (undefined / number) in file special-consts.scad, line 47
ECHO: undef
WARNING: undefined operation (undefined / number) in file special-consts.scad, line 48
ECHO: undef
WARNING: undefined operation (number / undefined) in file special-consts.scad, line 49
ECHO: undef
ECHO: "-- calculating resulting in +inf --"
ECHO: inf
ECHO: inf
ECHO: "-- calculating resulting in -inf --"
ECHO: -inf
ECHO: -inf
ECHO: "-- comparing inf --"
ECHO: "inf == inf"
ECHO: "-- calculating with inf --"
ECHO: "inf + 1 is inf"
ECHO: "inf - 1000 is inf"
ECHO: "inf * inf  is inf"
ECHO: "inf /  -0  is -inf"
ECHO: "inf / inf  is nan"
ECHO: "-- comparing nan --"
ECHO: "nan != nan"
ECHO: "-- 3d objects --"
ECHO: "-- for loops --"
WARNING: Bad range parameter in for statement: too many elements (4294967295) in file special-consts.scad, line 106
