tail function:

Extract a string tail. If the first argument is a string and the second argument is a positive integer, the returned value will be a string with the end of the first argument. See also take_last.

Examples:

• running: (tail "test-123", 4) will give: "-123"

• running: (tail "test-123", 20) will give: "test-123"

• running: (tail 20, 20) will return nothing

• running: (tail "20", -5) will return nothing