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<h2><code><a class="back" title="Return to index" href="../index.html#forall2">forall/2</a></code></h2>
<h4>Description</h4>
<blockquote>
<pre>
forall(Generator, Test)
</pre>
<p>
This predicate is true if, for all solutions of Generator, Test is true (some Prolog compilers already define this or a similar predicate).
</p>
</blockquote>
<h4>Template and modes</h4>
forall(+callable, +callable)
<h4>Errors</h4>
<dl>
<dt>Generator is not a callable term:</dt>
<dd><code>type_error(callable, Generator)</code></dd>
<dt>Test is not a callable term:</dt>
<dd><code>type_error(callable, Test)</code></dd>
</dl>
<h4>Examples</h4>
| ?- forall(member(X, [1, 2, 3]), write(X)).
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Last updated on: September 6, 2002
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