The Null String
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The Null String
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A null string is a character string of zero length. Unlike the $Null property that indicates that the value is unknown or unassigned, the null string is a known value.
For example, if you have two variables, x and y, both of which are null strings, then the expression
x = ” and y <> ‘abc’
is logically true.
Updated
ByJason Lee
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