nth

nth( 
x_index0 
l_list 
) 
=> g_result / nil

Description

Returns an index-selected element of a list, assuming a zero-based index.

Thus, nth(0 l_list) is the same as car(l_list). The value nil is returned if x_index0 is negative or is greater than or equal to the length of the list.

Arguments

x_index0	Index of the list element you want to be returned.
l_list	List of elements.

Value Returned

g_result	Indexed element of l_list, assuming a zero-based index
nil	If x_index0 is negative or is greater than or equal to the length of the list.

Examples

nth( 1 '(a b c) )    
=> b

z = '(1 2 3)         
=> (1 2 3)

nth(2 z)             

=> 3

nth(3 z)             

=> nil

Related Topics

list

nthcdr

nthelem

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