Expressions and Operators

 

The set of ZPL operators is shown in Table 5 along with the associativity of each operator. Operators with highest precedence are listed at the top of the table. Those with lowest precedence are listed at the bottom. The @ operator has highest precedence. Unary operators have higher precedence than the reduction and scan operators (which are can be either unary or binary operators), and these in turn have higher precedence than the remaining binary operators.

   
Table 5: Operators in ZPL.

• Unary Operators
  • Unary Plus and Minus
  • Logical Negation
• Reductions and Scans
  • Partial Scans.
  • Partial Reductions.
  • Floods.
• Binary Operators
  • Arithmetic Operators
  • Relational Operators
  • Logical Operators
  • The At Operator
  • Mask Operators
  • Region Operators
    • The Of Operator.
    • The In Operator.
    • The At Operator.
• Procedure Calls
• L-Values