Logical NOT

[Joe Horn]

(06-08-2015 01:32 AM)Alberto Candel Wrote:  There seems to be an error with logical NOT (and other logicals) in CAS. The ToolBox shows "NOT" with capital letters, but when selecting it from CAS, transforms to lower case letters ("not"). In lower case in CAS it does not work (returns error).

Lowercase "not" does work in CAS, but then it requires parentheses (contrary to what the help screen says), like this:

not(5) --> 0.
not(0) --> 1.

This split personality of NOT/not in CAS is also found in other functions, e.g. the XOR/xor function in CAS:

1 XOR 2 --> 0 (ok)
xor(1,2) --> 0. (ok)
1 xor 2 --> error
XOR(1,2) --> error

Needless to say, the HP Prime has many personality quirks, unlike us perfectly balanced humans.