ThinBASIC Core Language > BuiltIn Functions > String functions

Description

Return the UTF-8 code (0 to 65536) of the specified character in a string.

Syntax

y = ASC(StringExpression [, position])

Returns

Number

Parameters

Name

Type

Optional

Meaning

StringExpression

String

A string expression from which to extract the code.

Can be an ASCII string or an UTF-8 string.

Position

Number

Yes

Position in chars inside string_expression from which to extract the code.

If position is not specified, the first position is taken.

If position is negative ASC counts from the end of the string.

If position is zero or greater than the length of the string -1 is returned

Remarks

Restrictions

See also

Examples

'---ASC can be used to avoid some MID$ operations. For example:

char = ASC(Mid$(MyString, Position, 1))

'---is equivalent to ...

char = ASC(MyString, Position)

Thanks to Abraxas for the following script example

' Usage of the ASC Instruction example

' Return Values of a string. Will show a box with String to check

' HELLO

'Current Char H Value 72

'Current Char E Value 69

'Current Char L Value 76

'Current Char O Value 79

Dim MyString As String VALUE = "HELLO"

Dim sMsg As String

Dim StrPos As Long

Dim CharVal As Byte

sMsg = "String to check " & $CRLF & $CRLF & MyString & $CRLF & $CRLF

For StrPos = 1 To Len(MyString) '---Loop for the length of the string

CharVal = ASC (MyString,StrPos)

sMsg += " Current Char " & Mid$(MyString,StrPos,1) & " Value " & CharVal & $CRLF

MSGBOX 0, sMsg