Char.IsLower Method
Definition
Indicates whether a Unicode character is categorized as a lowercase letter.
Overloads
IsLower(Char) |
Indicates whether the specified Unicode character is categorized as a lowercase letter. |
IsLower(String, Int32) |
Indicates whether the character at the specified position in a specified string is categorized as a lowercase letter. |
IsLower(Char)
Indicates whether the specified Unicode character is categorized as a lowercase letter.
public:
static bool IsLower(char c);
public static bool IsLower (char c);
static member IsLower : char -> bool
Public Shared Function IsLower (c As Char) As Boolean
Parameters
- c
- Char
The Unicode character to evaluate.
Returns
true
if c
is a lowercase letter; otherwise, false
.
Examples
The following code example demonstrates IsLower.
using namespace System;
int main()
{
char ch = 'a';
Console::WriteLine( Char::IsLower( ch ) ); // Output: "True"
Console::WriteLine( Char::IsLower( "upperCase", 5 ) ); // Output: "False"
}
using System;
public class IsLowerSample {
public static void Main() {
char ch = 'a';
Console.WriteLine(Char.IsLower(ch)); // Output: "True"
Console.WriteLine(Char.IsLower("upperCase", 5)); // Output: "False"
}
}
Module IsLowerSample
Sub Main()
Dim ch As Char
ch = "a"c
Console.WriteLine(Char.IsLower(ch)) ' Output: "True"
Console.WriteLine(Char.IsLower("upperCase", 5)) ' Output: "False"
End Sub
End Module
Remarks
Valid lowercase letters are members of the following category in UnicodeCategory: LowercaseLetter
.
See also
IsLower(String, Int32)
Indicates whether the character at the specified position in a specified string is categorized as a lowercase letter.
public:
static bool IsLower(System::String ^ s, int index);
public static bool IsLower (string s, int index);
static member IsLower : string * int -> bool
Public Shared Function IsLower (s As String, index As Integer) As Boolean
Parameters
- s
- String
A string.
- index
- Int32
The position of the character to evaluate in s
.
Returns
true
if the character at position index
in s
is a lowercase letter; otherwise, false
.
Exceptions
s
is null
.
index
is less than zero or greater than the last position in s
.
Examples
The following code example demonstrates IsLower.
using namespace System;
int main()
{
char ch = 'a';
Console::WriteLine( Char::IsLower( ch ) ); // Output: "True"
Console::WriteLine( Char::IsLower( "upperCase", 5 ) ); // Output: "False"
}
using System;
public class IsLowerSample {
public static void Main() {
char ch = 'a';
Console.WriteLine(Char.IsLower(ch)); // Output: "True"
Console.WriteLine(Char.IsLower("upperCase", 5)); // Output: "False"
}
}
Module IsLowerSample
Sub Main()
Dim ch As Char
ch = "a"c
Console.WriteLine(Char.IsLower(ch)) ' Output: "True"
Console.WriteLine(Char.IsLower("upperCase", 5)) ' Output: "False"
End Sub
End Module
Remarks
Character positions in a string are indexed starting from zero.
Valid lowercase letters are members of the following category in UnicodeCategory: LowercaseLetter
.