reverse

Arguments

Returns

A new list which whose top-level structure is the reverse of the input list. If the argument is not a list, returns the argument.

Description

None of the elements of the original list is copied. The resulting list contains elements which are eq to the corresponding elements in the original. The original list is not changed.

Example

    Gamma> S = list(1,2,3);
    (1 2 3)
    Gamma> R = reverse (S);
    (3 2 1)
    Gamma> S;
    (1 2 3)
    Gamma> car (S);
    1
    Gamma> caddr(R);
    1
    Gamma> eq (car (S),caddr(R));
    t
    Gamma>