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   ► KBProgrammingDelphi for W...   Print This     
Delphi for Win32:
Delphi Empty String Check (length(s) = 0)
Posted 15 years ago on 9/19/2009
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Languages Focus: Empty String Check

An empty string is a zero length string, a string that is equal to null (""), or not assigned. In some languages, you can check if a string is empty by comparing it to an empty string (""). Some languages distinguish between nil and null ("") so checking if the length is 0 is easier.

Delphi Empty String Check

Length() or SizeOf() will correctly identify an unassigned string variable or an empty string.

Syntax Example:
if length(s) = 0 then
  ShowMessage('empty string');


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