• <GetStart>
  • CSPro User's Guide
    • The CSPro System
    • Data Dictionary Module
    • The CSPro Language
      • Introduction to CSPro Language
      • Data Requirements
      • CSPro Program Structure
      • Programming Standards
      • Code Folding
      • Debugging CSPro Applications
      • Declaration Section
      • Procedural Sections
      • Logic
      • Language Elements
        • Version
        • Delimiters
        • Comments
        • Preprocessor
        • Variables and Constants
          • Data Items
          • This Item ($)
          • Subscripts
          • Numbers
          • Boolean Values
          • Special Values
          • Refused Value
          • String Literals
          • Newline Handling
        • Expressions
        • Operators
        • Files
        • Miscellaneous
    • Data Entry Module
    • Batch Editing Applications
    • Tabulation Applications
    • Data Sources
    • CSPro Statements and Functions
    • Templated Reporting System
    • HTML and JavaScript Integration
    • Action Invoker
    • Appendix
  • <CSEntry>
  • <CSBatch>
  • <CSTab>
  • <DataViewer>
  • <TextView>
  • <TblView>
  • <CSFreq>
  • <CSDeploy>
  • <CSPack>
  • <CSDiff>
  • <CSConcat>
  • <Excel2CSPro>
  • <CSExport>
  • <CSIndex>
  • <CSReFmt>
  • <CSSort>
  • <ParadataConcat>
  • <ParadataViewer>
  • <CSCode>
  • <CSDocument>
  • <CSView>
  • <CSWeb>

Boolean Values

There are two numeric values in the CSPro language that translate to boolean values as used in other programming languages. The value true is equivalent to 1 and the value false is equivalent to 0. Note that you need to be cautious when using true in conditional expressions, as a conditional expression is true if it is neither zero nor special, but comparing something with true is true only if the compared value is 1. That is:
numeric value = 2;

if value then
    errmsg("This will be displayed");
endif;

if value = true then
    errmsg("This will not be displayed");
endif;
The tonumber function will convert the string expressions "true" and "false" to 1 and 0.
See also: Special Values