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