         Parameters:  [ADD MUL DIV EXP TRUN][var1 var2 ... var8]
  
 If no parameters are specified, this command displays the values
 of up to 8 user variables. 
  
 The user variables may be set to absolute unsigned values or set
 relatively by  +  and  -.  The list of values will expand to the
 largest number of values set; the "TRUN" option  will  truncate,
 or shorten, the list. 
  
 Arithmetic operations  may  be specified by:  "ADD" (the default
 operation), "MUL" (multiply times variables), "DIV" (divide into
 variables), and "EXP" (raise variables to exponents).  Examples: 
  
     VAR 47.61 47.61     <--- calculate 47.61*7 and 47.61*9
     VAR 7 9 M; VAR
  
     VAR 769 770 770     <--- calculate 769**2,770**2,770**3
     VAR 2 2 3 EX; VAR
  
