# Function Reference

# StringIsSpace

Checks if a string contains only whitespace characters.

StringIsSpace ( "string" )

## Parameters

string | The string to check

## Return Value

Success: | 1.
Failure: | 0 if string contains non-whitespace characters.

## Remarks

Whitespace includes Chr(9) thru Chr(13) which are HorizontalTab, LineFeed, VerticalTab, FormFeed, and CarriageReturn. Whitespace also includes the null string ( Chr(0) ) and the standard space ( Chr(32) ).

## Related

StringIsAlNum, StringIsAlpha, StringIsASCII, StringIsDigit, StringIsLower, StringIsUpper, StringIsXDigit, StringLower, StringStripCR, StringStripWS, StringUpper

## Example

    #include <MsgBoxConstants.au3>

    Local $sString = "   " & @CRLF & @CRLF & Chr(11) & @TAB & " " & @CRLF ; Check whether this string contains only whitespace characters.
    If StringIsSpace($sString) Then
        MsgBox($MB_SYSTEMMODAL, "", "The variable contains only whitespace characters.")
    Else
        MsgBox($MB_SYSTEMMODAL, "", "The variable does not contain whitespace characters.")
    EndIf