Command: upper
  
Syntax: 
  x2 = upper(x1)
  
Description: 
  Convert an atom or sequence to upper case.
  
Example: 
     s = upper("Euphoria")
       -- s is "EUPHORIA"
       
       a = upper('g')
       -- a is 'G'
       
       s = upper({"Euphoria", "Programming"})
       -- s is {"EUPHORIA", "PROGRAMMING"}
 
See Also: 
  lower
  
