cardinality

From the SETL Wiki

#
Category	set, string, tuple
Syntax	function
Compatibility
CIMS SETL	yes
SETL-S	yes
SETL2	yes
GNU SETL	yes

Contents 1 Purpose 2 Synopsis 3 Description 4 Examples 5 Notes

Purpose

Size of string, set or tuple

Synopsis

 #x

Description

• If x is a string, returns its length in bytes
• If x is a tuple, returns the maximum index
• If x is a set, returns the number of elements

Examples

• # "abc"
  

  Result: 3

• # [1, 2, 3, 4]
  

  Result: 4

• # {1, 2}
  

  Result: 2

Notes

• This page is called cardinality because '#' is not a valid page name in MediaWiki.