SUBSTR(<string>, <startpos>, [<length>],[<padchar>])
      returns a string

The result is a string of <length> characters made up the characters in
<string> beginning at <startpos>.

If <length> is not specified, then all of the string to the right of
<startpos> will be returned. If the argument is specified, the returned
string will have <length> characters, filled out, if necessary, with
<padchar>.

The default pad character is a blank.

   Example:
         say substr('indifference',3,3);      >>> dif
         say substr('No way',4,5,'!')         >>> way!!

   Also see 
            
            
            
            

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