X

(xchg 'var 'var ..) -> any

Exchange the values of successive var argument pairs.

: (setq  A 1  B 2  C '(a b c))
-> (a b c)
: (xchg  'A C  'B (cdr C))
-> 2
: A
-> a
: B
-> b
: C
-> (1 2 c)

(xor 'any 'any) -> flg

Returns T if exactly one of the arguments evaluates to non-NIL.

: (xor T NIL)
-> T
: (xor T T)
-> NIL

(x| 'num ..) -> num

Returns the bitwise XOR of all num arguments. See also &, | and bit?.

: (x| 2 7)
-> 5
: (x| 2 7 1)
-> 4