Name
Low Function
Syntax
function Low(Type or variable
):Ordinal type
;
Description
The Low
function returns the smallest value of an
enumerated type, the lower bound of an array index, or the same
information for a variable of ordinal or array
type.
Low
is built into the compiler and is not a real
function.
Tips and Tricks
In a
for
loop, subrange type declaration, or any other situation where you use the limits of an ordinal or array type, always use theLow
function instead of referring explicitly to the low ordinal value. A future version of your code might change the type, and you don’t want to scramble through all your code looking for explicit references to an enumerated literal that should really have been calls to theLow
function.Calling
Low
for aShortString
returns zero, which is the index of the length byte. You cannot callLow
for anAnsiString
orWideString
, so use 1 because long strings always have an origin of 1.Low
for an open array parameter is always zero, regardless of the type or range of the actual array argument.
Example
See the High
function for an example.
See Also
Dec Procedure, High Function, Inc Procedure, Length Function, Pred Function, Succ Function |
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