VAL returns a real value for numeric strings and zero for non-numeric strings and can check the value status of parameters (PENDING, DETERMINED, available)

Syntax

  1. VAL(StrExpr$)
  2. VAL("PENDING:ParName")
  3. VAL("DETERMINED:ParName")
  4. VAL("VALUE:ParName")

Arguments

  • StrExpr$ is a string value or expression.
  • "PENDING:ParName" returns 0 if ParName has a DETERMINED value and 1 if ParName has a PENDING value
  • "DETERMINED:ParName" returns 1 if ParName has a DETERMINED value and 0 if ParName has a PENDING value
  • "VALUE:ParName" returns value of ParName in tree status:
    1. If ParName has a DETERMINED value this value will be returned.
    2. If ParName is PENDING:
      • If ParName has a @PENDING:ParValue attribute, ParValue will be returned
      • Else, a warning will be issued that the value for ParName is PENDING but the session will continue with ParValue=0. 
    1. If ParName is not available in the knowledge base, a warning is issued, 0 will be returned and the session will continue.
    2. "NullString" is considered as a DETERMINED empty string 

Remarks

  1. "NullString" is considered as a DETERMINED empty string 

Examples

VAL("445.02")

returns

445.02

VAL("NullString")

returns

0

VAL("Qnowledge")

returns

0

VAL("PENDING:X")

returns

0 if X has a DETERMINED value and

1 if X has a PENDING value

VAL("DETERMINED:X")

returns

1 if X has a DETERMINED value and

0 if X has a PENDING value

 

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