### 5.2.3 Boolean operators : or xor and not

or (or ||), xor, and (or &&) are infixed
operators.

not is a prefixed operators.

If a and b are two booleans :

(a or b) (a || b) returns 0 (or false) if a and
b are equal to 0 and returns 1 (or true) otherwise.

(a xor b) returns 1 if a is equal to 1 and b is
equal to 0 or if a is equal to 0 and b is equal to 1 and returns 0
if a and b are equal to 0
or if a and b are equal to 1 (it is the "exclusive or").

(a and b) or (a && b) returns 1 (or true) if a
and b are equal to 1 and 0 (or false) otherwise.

not(a) returns 1 (or true) if a is equal to 0 (or
false), and 0 (or false) if a is equal to 1 (or
true).

Input :

1>=0 or 1<0

Output :

1

Input :

1>=0 xor 1>0

Output :

0

Input :

1>=0 and 1>0

Output :

1

Input :

not(0==0)

Output :

0