Name
Left Function
Class
Microsoft.VisualBasic.Strings
Syntax
Left(str, length
)
-
str
(required; String) The string to be processed
-
length
(required; Long) The number of characters to return from the left of the string
Return Value
String
Description
Returns a string containing the leftmost
length
characters of
str
Rules at a Glance
If
length
is 0, a zero-length string (“”) is returned.If
length
is greater than the length ofstr
,str
is returned.If
str
isNothing
, Left returnsNothing
.
Programming Tips and Gotchas
Use the Len function to determine the overall length of
str
.The Left function corresponds to the BCL System.String class’ Substring method. For example, the following two assignments to the
sCity
variable are functionally identical:Dim sCity As String Dim sLocation As String = "New York, New York" sCity = Left(sLocation, 8) sCity = sLocation.Substring(0, 8)
Note that the Substring method uses a zero-based index to determine the starting position of the substring.
See Also
Get VB.NET Language in a Nutshell, Second Edition now with the O’Reilly learning platform.
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