Nyquist / XLISP 2.0 - Contents | Tutorials | Examples | Reference

car

Type: - function (subr)

Source: - xllist.c

Syntax

(car expr): expr - a list or list expression
returns - the first element of the list

Description

The 'car' function returns the first element of the expression. If the first expression is itself a list, then the sublist is returned. If the list is NIL , NIL is returned.

The 'car' function returns the same result as the first function.

Examples

(car '(a b c))       => A
(car '((a b) c d))   => (A B)
(car NIL)            => NIL
(car 'a)             => error: bad argument type
(setq bob '(1 2 3))  => (1 2 3)
(car bob)            => 1