**VBScript Tutorials - Herong's Tutorial Examples** - Version 6.00, by Dr. Herong Yang

Precedences of Operations

This section provides the order of precedence for operations commonly used in VBScript. Operations in a complex expression must be evaluated according to the order of operation precedence.

In the previous section, we learned that operations in a complex expression must be evaluated according to the order of operation precedence. The following table shows you the relative order of precedence for some commonly used operations:

Precedence Operations Notes 12 (...) Operation group 11 ^ Exponentiation 10 - Unary negation 9 * / \ Mod Multiplication, Division, ... 8 + - Addition and Subtraction 7 & + String concatenation 6 = <> < > <= >= Comparisons 5 Not Logical negation 4 And Logical conjunction 3 Or Logical disjunction 2 Xor Logical exclusion 1 Eqv Logical equivalence 0 Imp Logical implication

Remember that:

- Operations with higher precedence values must be evaluated first.
- Operations of the same precedence value must be evaluated from left to right.

See the next section for examples of expressions and evaluation orders.

Table of Contents

Introduction of VBScript - Visual Basic Scripting Edition

Variant Data Type, Subtypes, and Literals

Numeric Comparison Operations and Logical Operations

String Operations - Concatenation and Comparison

Variable Declaration and Assignment Statement

►Expression and Order of Operation Precedence

Statement Syntax and Statement Types

Array Data Type and Related Statements

Array References and Array Assignment Statements

Conditional Statements - "If ... Then" and "Select Case"

Loop Statements - "For", "While", and "Do"

"Function" and "Sub" Procedures

Inspecting Variables Received in Procedures

Error Handling Flag and the "Err" Object

Regular Expression Pattern Match and Replacement

scrrun.dll - Scripting Runtime DLL Library

IE Web Browser Supporting VBScript