Empty string: Difference between revisions
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slength(s) = "";
slength(s) # "";</lang>
=={{header|Mercury}}==
There's nothing special about empty strings in Mercury.
<lang Mercury>S = "", % assignment
( if S = "" then ... else ... ), % checking if a string is empty
( if not S = "" then ... else ... ), % checking if a string is not empty</lang>
=={{header|min}}==
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