Conceptual REXX Structure

Series of clauses

• 0 or more blanks 🡺 ignored
• Sequence of tokens
  • Comments /* … */
  • Strings
  • Symbols
  • Numbers
  • operators
• ; EOL
• Keywords
• Colon : (i.e. label)

Clauses

• 1 or more terms
  • Literal strings
  • Symbols
  • Function calls
  • Sub-expressions
• AND 0 or more operators

Types of clauses

• Null clause – ignored
• Labels
• Assignments
• Instructions
• commands

TR

/* DEMO */
OPTIONS „LOAD DATE.DEF“
A=5
Say a+14
Say date("S")