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PARAMETERS( ) Function

  • Articolo

Returns the number of parameters passed to the most recently called program, procedure, or user-defined function.

PARAMETERS( )

Return Values

Numeric

Remarks

PARAMETERS( ) is useful for determining how many parameters are passed to a program, procedure, or user-defined function.

Note   The value returned by PARAMETERS( ) is reset every time a program, procedure, or user-defined function is called or when ON KEY LABEL is executed. Unlike PARAMETERS( ), the PCOUNT( ) function does not get reset, so PCOUNT( ) may be preferable in most programming situations.

Examples

Example 1 calls a procedure and displays in a wait window the number of parameters passed.

Example 2 uses a procedure to display the average of 4 values.

* Example 1
DO testpar WITH 1,2,3

PROCEDURE testpar
PARAMETERS gn1,gn2,gn3
gcMessage = 'PARAMETERS( ) ='+ALLTRIM(STR(PARAMETERS( )))
WAIT WINDOW (gcMessage)
RETURN

* Example 2
SET TALK OFF
gnVal1 = 10
gnVal2 = 20
gnVal3 = 30
gnVal4 = 15
gnMin = getavg(gnVal1, gnVal2, gnVal3, gnVal4)
? 'Average value is '
?? gnMin

* This user-defined function permits up to 9 parameters to be passed.
* It uses the PARAMETERS( ) function to determine how many
* were passed and returns the average value.

FUNCTION getavg
PARAMETERS gnPara1,gnPara2,gnPara3,gnPara4,gnPara5, ;
   gnPara6,gnPara7,gnPara8,gnPara9
IF PARAMETERS( ) = 0
   RETURN 0
ENDIF
gnResult = 0
FOR gnCount = 1 to PARAMETERS( )
   gcCompare = 'gnPara' +(STR(gnCount,1))
   gnResult = gnResult + EVAL(gcCompare)
ENDFOR
gnResult = gnResult / (gnCount - 1)
RETURN gnResult

See Also

DO | FUNCTION | LPARAMETERS | LOCAL | PARAMETERS | PCOUNT( ) Function | PRIVATE | PROCEDURE | PUBLIC | SET UDFPARMS