Returns the number of parameters passed to the most recently called program, procedure, or user-defined function.
PARAMETERS(В ) |
Return Value
Numeric
Remarks
PARAMETERS(В ) is useful for determining how many parameters are passed to a program, procedure, or user-defined function.
Note: |
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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.
В | Copy Code |
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* 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 |