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=proto
int duk_is_boolean(duk_context *ctx, int index);
=stack
[ ... val! ... ]
=summary
<p>Returns 1 if value at <tt>index</tt> is a boolean, otherwise
returns 0. If <tt>index</tt> is invalid, also returns 0.</p>
=example
if (duk_is_boolean(ctx, -3)) {
/* ... */
}
=tags
stack