pty.

intConst  ::= digit nextDigit.

nextDigit ::= digit nextDigit |  empty.
</code></pre>

<h1>Bibliography</h1>

<p>Formal Syntax and Semantics of Programming Languages</p>

<p>Kenneth Slanneger, Barry L. Kurtz</p>

<p>Addison-Wesley 1995 </p>

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