duktape/website/api/duk_require_int.txt

=proto
int duk_require_int(duk_context *ctx, int index);

=stack
[ ... val! ... ]

=summary
<p>Like <code><a href="#duk_get_int">duk_get_int()</a></code>,
but throws an error if the value at <code>index</code> is not a number
or if the index is invalid.</p>

<!--
<p>The number is coerced as for <code><a href="#duk_get_int">duk_get_int()</a></code>
with only numeric inputs allowed.</p>
-->

=example
printf("int value: %d\n", duk_require_int(ctx, -3));

=tags
stack