VBScript Syntax Summary

Symbol	Type	Description
+ (addition)	Operator	Adds two numbers together. You can also use this to concatenate strings.
' (comment indicator)	Keyword	What follows this symbol on the line is a comment.
" (double quote)	Keyword	Shows the start and end of a literal string.
& (string concat-enation)	Operator	Performs the concatenation of two string expressions.
/ (division, floating point)	Operator	Divides two numbers and returns a floating-point result.
\ (division, integer)	Operator	Divides two numbers and returns an integer result.
= (equals)	Comparison	Checks whether two expressions are equivalent.
^ (exponent)	Operator	Raises a number to the power of an exponent.
> (greater than)	Comparison	Checks whether the left-side expression is greater than the right-side expression.
>= (greater than or equal)	Comparison	Checks whether the left-side expression isgreater than or equal to the right-side expression.
< (less than)	Comparison	Checks whether the left-side expression is less than the right-side expression.
<= (less than or equal)	Comparison	Checks whether the left-side expression is less than or equal to the right-side expression.
_ (line continuation character)-	Keyword	Indicates that the current line continues onto the next line.
* (multiplication)	Operator	Multiplies two numbers.
- (subtraction or indicator)	Operator	Finds the difference between two numbers; or, when applied to one operand, treats it as a negative value.
: (colon)		Indicates line separation, as in A = A + 1 : B = C + 1.
<> (not equal)	Comparison	Checks whether two expressions are not equivalent.
Abs	Function	Returns the absolute value of a number.
And	Logical operator	Performs a logical conjunction on two expressions.
Array	Function	Returns a variant comprising an array.
Asc	Function	Provides the character code corresponding to the first letter in a string as a return code.
AscB	Function	Like Asc, but returns the first byte rather than the first character of a string.
Atn	Function	Provides the arctangent of a number as a return code.
Call	Statement	Calls a procedure.
CBool	Function	Provides as a return code an expression that has been converted to a variant of subtype Boolean.
Cbyte	Function	Provides as a return code an expression that has been converted to a variant of subtype Byte.
CDate	Function	Provides as a return code an expression that has been converted to a variant of subtype Date.
CDbl	Function	Provides as a return code an expression that has been converted to a variant of subtype Double.
Chr	Function	Provides as a return code the character associated with the ASCII code. This function can return 1 or 2 bytes.
ChrB	Function	Returns the byte associated with the ASCII code.
Cint	Function	Provides as a return code an expression that has been converted to a variant of subtype Integer.
Clear	Method for the Err object	Results in resetting all of the Err objects properties to a no-error state.
CLng	Function	Provides as a return code an expression that has been converted to a variant of subtype Long.
Cos	Function	Provides as a return code the cosine of an angle.
CSng	Function	Provides as a return code an expression that has been converted to a variant of subtype Single.
CStr	Function	Provides as a return code an expression that has been converted to a variant of subtype String.
CVErr	Function	Provides as a return code a variant of subtype Error containing a user-provided error code.
Date	Function	Returns the current system date.
DateSerial	Function	Provides as a return code a variant of subtype Date for the given month, day, and year.
DateValue	Function	Provides as a return code a variant of subtype Date for the given string.
Day	Function	Provides as a return code a whole number of 1 through 31, representing the day of the month for the given date string.
Description	Property for he Err object	The string that describes the current error.
Dim	Statement	Declares variables.
Do…Loop	Statement	Repeats a block of code while a condition is True or until a condition becomes True.
Empty	Literal	Signifies that a variable is uninitialized.
Erase	Statement	Reinitializes fixed-size array elements and frees the storage space of dynamic arrays.
Err	Object	Provides information about run-time errors.
Eqv	Logical operator	Performs logical equivalence for the two expressions provided as operands.
Exit Do	Statement	Exits a Do…Loop code block.
Exit For	Statement	Exits a For…Next code block.
Exit Function	Statement	Exits a function.
Exit Sub	Statement	Exits a procedure.
Exp	Function	Returns e (the base of natural logarithms) raised to a power.
Fix	Function	Provides the integer portion of a number as a return code; if the number is negative, it provides the first number greater than the operand.
For…Next	Statement	Repeats a group of statements a designated number of times.
For Each…Next	Statement	Repeats a group of statements for each element in an array or a collection.
Function	Statement	Declares a procedure-level block of code that returns a value when called.
HelpContext	Property for	The context ID in a corresponding help the Err objectfile for the current error.
HelpFile	Property for the Err object	The corresponding help file for the current error.
Hex	Function	Provides as a return code a string repre-senting the hexadecimal value of a number.
Hour	Function	Provides as a return code a whole number from 0 through 23, representing the hour of the day.
If…Then…Else	Statement	Executes a group of statements, depending on the value of an expression.
Imp	Logical operator	Performs a logical implication on the two operands provided.
InputBox	Function	Displays a dialog box with a prompt, appropriate buttons, and an input text box and then returns the input text and button response to the calling program.
Int	Function	Provides the integer portion of a number as a return code; if the number is negative, it provides the first number less than the operand.
InStr	Function	Provides the position indicator of the first character of the target string within the search string.
InstrB	Function	Provides the position indicator of the first byte of the target string within the search string.
Is	Operator	Compares two object reference variables.
IsArray	Function	Provides as a return code a Boolean value signifying whether a variable is an array.
IsDate	Function	Provides as a return code a Boolean value signifying whether an expression can be converted to a date.
IsEmpty	Function	Provides as a return code a Boolean value signifying whether a variable has been initialized.
IsError	Function	Provides as a return code a Boolean value signifying whether an expression is an error value.
IsNull	Function	Provides as a return code a Boolean value signifying whether an expression contains no valid data (Null).
IsNumeric	Function	Provides as a return code a Boolean value signifying whether an expression can be evaluated as a number.
IsObject	Function	Provides as a return code a Boolean value signifying whether an expression repre-sents an OLE automation object.
LBound	Function	Provides as a return code the smallest available subscript for the stated dimen-sion of an array.
Lcase	Function	Provides as a return code a string that has been converted to lowercase.
Left	Function	Provides as a return code a specified number of characters from the left side of a string.
Len	Function	Provides as a return code the number of characters in a string or the number of bytes required to store a variable.
LenB	Function	Provides as a return code the number of bytes in a string or the number of bytes required to store a variable.
Log	Function	Provides as a return code the natural logarithm of a number.
Ltrim	Function	Provides a string that has leading (leftmost) spaces removed.
Mid	Function	Provides as a return code a described number of characters from a string.
Minute	Function	Provides as a return code a whole number from 0 through 59, representing the minute of the hour.
Mod	Operator	Divides two numbers and returns only the remainder.
Month	Function	Provides as a return code a whole number from 1 through 12, representing the month of the year.
MsgBox	Function	Shows a given prompt in a message dialog box with a button and returns the user's button response.
Not	Logical operator	Checks for logical Not equivalent condition.
Nothing	Literal	Removes reference and frees memory.
Now	Function	Returns the current setting of your computer's system date and time.
Null	Literal	Indicates no valid data state, as opposed to Empty, which indicates no data was ever assigned.
Number	Property for the Err object	The numeric error code for the current error.
Oct	Function	Provides as a return code a string repre-senting the octal value of a number.
On Error ResumeNext	Statement	Indicates that if an error occurs, control should resume at next statement.
Option Explicit	Statement	Indicates that variables must be declared.
Or	Operator	Performs a logical disjunction on two expressions.
Raise	Method for the Err object	Forces a run-time error to be raised.
Randomize	Statement	Starts a sequence for the random-number generator.
ReDim	Statement	Allocates or reallocates storage space and declares dynamic-array variables at the procedure level.
Rem	Statement	Used to include comments in a program. The single quote, which achieves the same purpose, is used more often.
Right	Function	Provides as a return code a described number of characters from the right side of a string.
Rnd	Function	Provides a random number as a return code.
Rtrim	Function	Provides a string that has trailing (rightmost) spaces removed.
Second	Function	Provides as a return code a whole number from 0 through 59, representing the second of the minute.
Set	Statement	Assigns an object reference.
Sgn	Function	Provides as a return code an integer disclosing the sign of a number.
Sin	Function	Provides as a return code the sine of an angle.
Source	Property for the Err object	The source of the error for the current error.
Space	Function	Returns the given number of spaces.
Sqr	Function	Provides as a return code the square root of a number.
Static	Statement (Procedure-level)	Declares a persistent variable. Contents will be retained from one call to the next.
StrComp	Function	Returns a value signifying the outcome of a string comparison.
String	Function	Returns a repeating character string of the number of characters described.
Sub	Statement	Declares procedures that do not provide a return code.
Tan	Function	Provides as a return code the tangent of an angle.
Time	Function	Returns a variant of subtype Date showing the current system time.
TimeSerial	Function	Returns a variant of subtype Date comprising the time for a specific hour, minute, and second.
TimeValue	Function	Returns a variant of subtype Date containing the time.
Trim	Function	Provides as a return code a duplicate of a string without leading spaces (LTrim), trailing spaces (RTrim), or both leading and trailing spaces (Trim).
Ubound	Function	Provides as a return code the largest available subscript for the indicated dimension of an array.
Ucase	Function	Returns a string that has been converted to uppercase.
Val	Function	Returns the numbers enclosed in a string. Not supported in current beta.
VarType	Function	Returns a value disclosing the subtype of a variable.
vbAbort	(See footnote*)	Applies to the MsgBox function; Value = 3 indicates abort.
vbAbortRetryIgnore	(See footnote*)	Applies to the MsgBox function; Value = 2 displays Abort, Retry, and Ignore buttons.
vbApplicationModal	(See footnote*)	Applies to the MsgBox function; Value = 0 indicates that the application is modal. The user must respond to the message box before continuing work in the current application.
vbArray	(See footnote*)	Applies to the VarType function; Value = 8192 indicates array.
vbBoolean	(See footnote*)	Applies to the VarType function; Value = 11 indicates Boolean.
vbByte	(See footnote*)	Applies to the VarType function; Value = 17 indicates byte.
vbCancel	(See footnote*)	Applies to the MsgBox function; Value = 2 indicates cancel.
vbCr	(See footnote*)	General purpose; indicates carriage-return character.
vbCritical	(See footnote*)	Applies to the MsgBox function; Value = 16 displays critical message icon.
vbCrLf	(See footnote*)	General purpose; indicates carriage-return and line-feed characters.
vbCurrency	(See footnote*)	Applies to the VarType function; Value = 6 indicates currency.
vbDataObject	(See footnote*)	Applies to the VarType function; Value = 13 indicates non-OLE automa-tion object.
vbDate	(See footnote*)	Applies to the VarType function; Value = 7 indicates date.
vbDefaultButton1	(See footnote*)	Applies to the MsgBox function; Value = 0 indicates the first button is the default.
vbDefaultButton2	(See footnote*)	Applies to the MsgBox function; Value = 256 indicates the second button is the default.
vbDefaultButton3	(See footnote*)	Applies to the MsgBox function; Value = 512 indicates the third button is the default.
vbDouble	(See footnote*)	Applies to the VarType function; Value = 5 indicates a double-precision, floating-point number.
vbEmpty	(See footnote*)	Applies to the VarType function; Value = 0 indicates empty.
vbError	(See footnote*)	Applies to the VarType function; Value = 10 indicates error.
vbExclamation	(See footnote*)	Applies to the MsgBox function; Value = 48 displays the warning message icon.
vbFalse	(See footnote*)	General purpose; indicates Boolean value represented by 0.
vbFriday	(See footnote*)	Applies to the Weekday function; Value = 6 indicates Friday.
vbIgnore	(See footnote*)	Applies to the MsgBox function; Value = 5 indicates ignore.
vbInformation	(See footnote*)	Applies to the MsgBox function; Value = 64 displays information message icon.
vbInteger	(See footnote*)	Applies to the VarType function; Value = 2 indicates integer.
vbLf	(See footnote*)	General purpose; indicates line-feed character.
vbLong	(See footnote*)	Applies to the VarType function; Value = 3 indicates long integer.
vbMonday	(See footnote*)	Applies to the Weekday function; Value = 2 indicates Monday.
vbNo	(See footnote*)	Applies to the MsgBox function; Value = 7 indicates no.
vbNull	(See footnote*)	Applies to the VarType function; Value = 1 indicates null.
vbObject	(See footnote*)	Applies to the VarType function; Value = 9 indicates OLE automation object.
vbObjectError	(See footnote*)	Indicates an object-generated error.
vbOK	(See footnote*)	Applies to the MsgBox function; Value = 1 indicates OK.
vbOKCancel	(See footnote*)	Applies to MsgBox function; Value = 1 displays OK and Cancel buttons.
vbOKOnly	(See footnote*)	Applies to the MsgBox function; Value = 0 displays OK button only.
vbQuestion	(See footnote*)	Applies to the MsgBox function; Value = 32 displays warning query icon.
vbRetry	(See footnote*)	Applies to the MsgBox function; Value = 4 indicates retry.
vbRetryCancel	(See footnote*)	Applies to the MsgBox function; Value = 5 displays Retry and Cancel buttons.
vbSaturday	(See footnote*)	Applies to the Weekday function; Value = 7 indicates Saturday.
vbSingle	(See footnote*)	Applies to the VarType function; Value = 4 indicates single-precision, floating-point number.
vbString	(See footnote*)	Applies to the VarType function; Value = 8 indicates string.
vbSunday	(See footnote*)	Applies to the Weekday function; Value = 1 indicates Sunday.
vbSystemModal	(See footnote*)	Applies to the MsgBox function; Value = 4096 indicates system modal. All applications are suspended until the user responds to the message box.
vbThursday	(See footnote*)	Applies to the Weekday function; Value = 5 indicates Thursday.
vbTrue	(See footnote*)	General purpose; indicates Boolean value represented by -1.
vbTuesday	(See footnote*)	Applies to the Weekday function; Value = 3 indicates Tuesday.
vbUseSystem	(See footnote*)	Applies to the Weekday function; Value = 0 uses the NLS API setting.
vbVariant	(See footnote*)	Applies to the VarType function; Value = 12 indicates variant.
vbWednesday	(See footnote*)	Applies to the Weekday function; Value = 4 indicates Wednesday.
vbYes	(See footnote*)	Applies to the MsgBox function; Value = 6 indicates yes.
vbYesNo	(See footnote*)	Applies to the MsgBox function; Value = 4 displays Yes and No buttons.
vbYesNoCancel	(See footnote*)	Applies to the MsgBox function; Value = 3 displays Yes, No, and Cancel buttons.
Weekday	Function	Returns a whole number showing the day of the week.
While…Wend	Statement	Performs a series of statements as long as a given condition is True.
Xor	Logical operator	Performs logical exclusion on the operands.
Year	Function	Returns a whole number showing the year for the date string representation.
*The symbols with the vb prefix are values expected by various VBScript functions. In Visual Basic these are intrinsic contants. In VBScript, you must declare these as variables if you wish to treat them as constants since there is no direct constant support.