List Contains Element Base Property

If the first element of the list is equal to the value you are looking for, then the list contains the value.

if x = value, then stack [ x, y ] contains value = True

Examples

if 5 = 5, then stack [ 5, [ 10, [ 15, [ ] ] ] ] contains 5 = True

if "Apple" = "Apple", then stack [ "Apple", [ "Banana", [ "Cherry", [ ] ] ] ] contains "Apple" = True

if True = True, then stack [ True, [ False, [ ] ] ] contains True = True

The examples are a bit odd because they are only showing cases where 'x' is equal to 'value' (of course 5 is equal to 5!). But 'x' often does not match 'value,' and we have to look at the rest of the elements on the list.

Quiz (1 point)

Please fill in the blank:

if 2 == 2, then (list [ 2, [ 4, [ 8, [ ] ] ] ] contains 2) = _____

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