log_exp

Reference

Syntax

... { {operand1 {=|EQ|<>|NE|>|GT|<|LT|>=|GE|<=|LE
                |CO|CN|CA|NA|CS|NS|CP|NP
                |BYTE-CO|BYTE-CN|BYTE-CA|BYTE-NA|BYTE-CS|BYTE-NS
                |O|Z|M} operand2}
    | {operand [NOT] BETWEEN operand1 AND operand2}
    | {<fs> IS [NOT] ASSIGNED}
    | {ref IS [NOT] BOUND}
    | {operand IS [NOT] INITIAL}
    | {operand IS [NOT] REQUESTED}
    | {operand IS [NOT] SUPPLIED}
    | {[operand [NOT] IN] seltab} } ... .

Effect

Logical expression for formulating a condition in certain statements. Logical expressions can be bracketed explicitly with ( ), linked with AND and OR, and negated with NOT.

Additions

• =|EQ|<>|NE|>|GT|<|LT|>=|GE|<=|LE
  Relational pperators for All Data Types
  
  
• CO|CN|CA|NA|CS|NS|CP|NP
  Relational Operators for Character-Type Data Types
  
  
• BYTE-CO|BYTE-CN|BYTE-CA|BYTE-NA|BYTE-CS|BYTE-NS
  Relational Operators for Byte-Type Data Types.
  
  
• O|Z|M
  Relational Operators for Bit Patterns
  
  
• [NOT] BETWEEN
  Determines interval assignment.
  
  
• IS [NOT] ASSIGNED
  Determines whether a memory area is assigned to a field symbol <fs>.
  
  
• IS [NOT] BOUND
  Determines whether a reference variable ref is valid.
  
  
• IS [NOT] INITIAL
  Determines whether an operand operand is initial.
  
  
• IS [NOT] REQUESTED
  Determines whether an output paramater operand of a procedure is requested.
  
  
• IS [NOT] SUPPLIED
  Determines whether a formal parameter operand of a procedure is supplied with data or requested.
  
  
• [dobj [NOT] IN] seltab
  Determines whether an operand operand fulfills the conditions of a selection table seltab.