Strings.Asc Method

Definition

Namespace:

Microsoft.VisualBasic

Assembly:

Microsoft.VisualBasic.Core.dll

Returns an integer value representing the character code corresponding to a character.

Overloads

Asc(Char)	Returns an integer value representing the character code corresponding to a character.
Asc(String)	Returns an integer value representing the character code corresponding to a character.

Asc(Char)

Source:

Strings.vb

Returns an integer value representing the character code corresponding to a character.

public:
 static int Asc(char String);

public static int Asc (char String);

static member Asc : char -> int

Public Function Asc (String As Char) As Integer

Parameters

String

Char

Required. Any valid Char or String expression. If String is a String expression, only the first character of the string is used for input. If String is Nothing or contains no characters, an ArgumentException error occurs.

Returns

Int32

The character code corresponding to a character.

Examples

The following example uses the Asc function to return Integer character codes corresponding to the first letter in each string.

Dim codeInt As Integer
' The following line of code sets codeInt to 65.
codeInt = Asc("A")
' The following line of code sets codeInt to 97.
codeInt = Asc("a")
' The following line of code sets codeInt to 65.
codeInt = Asc("Apple")

Remarks

Asc returns the code point, or character code, for the input character. This can be 0 through 255 for single-byte character set (SBCS) values and -32768 through 32767 for double-byte character set (DBCS) values.

AscW returns the Unicode code point for the input character. This can be 0 through 65535. The returned value is independent of the culture and code page settings for the current thread.

Note

The AscB function of earlier versions of Visual Basic returns a code for a byte, rather than a character. It is used primarily for converting strings in double-byte character set (DBCS) applications. All Visual Basic 2005 strings are in Unicode, and AscB is no longer supported.

See also

• Chr(Int32)
• ChrW(Int32)
• System.Globalization
• CultureInfo
• ANSICodePage
• ArgumentException
• Functions (Visual Basic)

Asc(String)

Source:

Strings.vb

Returns an integer value representing the character code corresponding to a character.

public:
 static int Asc(System::String ^ String);

public static int Asc (string String);

static member Asc : string -> int

Public Function Asc (String As String) As Integer

Parameters

String

String

Required. Any valid Char or String expression. If String is a String expression, only the first character of the string is used for input. If String is Nothing or contains no characters, an ArgumentException error occurs.

Returns

Int32

The character code corresponding to a character.

Examples

The following example uses the Asc function to return Integer character codes corresponding to the first letter in each string.

Dim codeInt As Integer
' The following line of code sets codeInt to 65.
codeInt = Asc("A")
' The following line of code sets codeInt to 97.
codeInt = Asc("a")
' The following line of code sets codeInt to 65.
codeInt = Asc("Apple")

Remarks

Asc returns the code point, or character code, for the input character. This can be 0 through 255 for single-byte character set (SBCS) values and -32768 through 32767 for double-byte character set (DBCS) values.

AscW returns the Unicode code point for the input character. This can be 0 through 65535. The returned value is independent of the culture and code page settings for the current thread.

Note

The AscB function of earlier versions of Visual Basic returns a code for a byte, rather than a character. It is used primarily for converting strings in double-byte character set (DBCS) applications. All Visual Basic 2005 strings are in Unicode, and AscB is no longer supported.

See also

• Chr(Int32)
• ChrW(Int32)
• System.Globalization
• CultureInfo
• ANSICodePage
• ArgumentException
• Functions (Visual Basic)