HP Prime CAS programming

[compsystems]

(01-22-2020 01:15 PM)Tim Wessman Wrote:  The problem is we cannot tell if it is variable or a function as the CAS doesn't really make that distinction in a way we have access to.

a function in CAS, internally contains the -> symbol or the block -> BEGIN END

which will identify the type of data function of a symbolic variable

1:

PHP Code:

#cas
 function casprg() return ABS(x+y*i); end; 


is recoded as

PHP Code:

casprg := ( seq[ ] ) -> RETURN( ABS( x + y*i ) ) 


while a variable does not contain the -> symbol

casvar1 := x+y*i


2:

PHP Code:

#cas
 function casprg1() local r;  r:= ABS(x+y*i); return r; end; 


is recoded as

PHP Code:

casprg1 := ( seq[ ] )
->BEGIN  
 LOCAL r; 
  r:=ABS(x+y*i);  
  RETURN(r);  
END;