position1.0

position item list position string1 string2

On a list, reports the first position of item in list, or false if it does not appear.

On strings, reports the position of the first appearance string1 as a substring of string2, or false if it does not appear.

Note: The positions are numbered beginning with 0, not with 1.

;; suppose mylist is [2 7 4 7 "Bob"]
show position 7 mylist
=> 1
show position 10 mylist
=> false
show position "in" "string"
=> 3

See also member?.