Subject: XploRe: Learning Guide
See XploRe:

Quantlet: quant15
Description: Square root with warning, if the argument is negative.
Download: quant15.xpl

Code:
  proc() = test(x)   ; defines a procedure

    warning(x<0,"Negative argument!") 
                     ; displays a warning box containing the
                     ;    specified text in case x is 
                     ;    negative at the end of the program 

    sqrt(abs(x))     ; computes the squareroot of abs(x), 
                     ;    whatever the above command found 
                     ;    about x

  endp             ; end of the procedure
;
  test(-9)           ; runs the procedure with value -9

Subject: XploRe: Learning Guide
See XploRe:

© MD*Tech - Method and Data Technologies, generated on 6.6.2000 .