• Chapter 1: Getting Started with Stylus Studio®
• Chapter 2: Editing and Querying XML
• Chapter 3: Converting Non-XML Files to XML
• Chapter 4: Working with XSLT
• Chapter 5: Creating XSLT Using the XSLT Mapper
• Chapter 6: Debugging Stylesheets
• Chapter 7: Defining XML Schemas
• Chapter 8: Defining Document Type Definitions
• Chapter 9: Writing XPath Expressions
  • About the XPath Processor
  • Using the XPath Query Editor
  • Sample Data for Examples and Practice
  • Getting Started with Queries
  • Specifying the Nodes to Evaluate
  • Handling Strings and Text
  • Specifying Boolean Expressions and Functions
  • Specifying Number Operations and Functions
    • Performing Arithmetic Operations
    • Calling Number Functions
  • Comparing Values
  • Finding a Particular Node
  • Obtaining a Union
  • Obtaining Information About a Node or a Node Set
  • Using XPath Expressions in Stylesheets
  • Accessing Other Documents During Query Execution
  • XPath Quick Reference
• Chapter 10: Working with XQuery in Stylus Studio
• Chapter 11: Composing Web Service Calls
• Chapter 12: Accessing Relational Data as XML
• Chapter 13: Building XML Pipelines
• Chapter 14: Publishing XML Data
• Chapter 15: Integrating with Third-Party File Systems
• Chapter 16: Extending Stylus Studio
• Chapter 17: The Stylus Studio Java API
• Chapter 18: Stylus Studio GUI Reference

Home > Online Product Documentation > Table of Contents > Performing Arithmetic Operations

Performing Arithmetic Operations

In queries, a number represents a floating-point number. A number can have any double-precision 64-bit format IEEE 754 value. This includes

The numeric operators convert their operands to numbers as if by calling the number() function. See Converting an Object to a Number.

You can use the following arithmetic operators in queries:

XML allows hyphens ( -) in names. Consequently, the subtraction operator ( -) typically needs to be preceded by white space. For example, foo-bar evaluates to a node set that contains the child elements named foo-bar. However, foo - bar evaluates to the difference between the result of converting the string value of the first foo child element to a number and the result of converting the string value of the first bar child to a number.

The mod operator is the same as the % operator in Java and ECMAScript. But it does not perform the same operation as the IEEE remainder operation, which returns the remainder from a rounding division.