INT
     Converts a string that consists of numeric characters into an integer,
     if you specify a string for the parameter.
     Converts a keyword into its DECTPU internal integer equivalent, if you
     specify a keyword for the parameter.
     Accepts an integer parameter without generating an error; returns the
     integer you specified.
  Syntax
     integer := INT ({string | keyword | integer})
  Parameters
     string               A quoted string, or an expression evaluating to a
                          quoted string, consisting of numeric characters.
     keyword              A keyword whose integer equivalent you want the
                          INT built-in to return.
     integer              Any integer.  INT supports this parameter solely
                          to prevent DECTPU from signaling an error if you
                          inadvertently specify an integer parameter.
  Comments
     This built-in returns 0 if the string is not a number.
     The functionality of converting keywords to integers maintains
     compatibility with versions of DECTPU that did not support keywords as
     a separate data type.
  Examples
     The following assignment statement converts the string "12345" into an
     integer value and stores it in the variable user_int.
     user_int := INT ('12345')