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<html><body><h1>JavaScript Operators</h1><h2>The in Operator</h2><p>The in operator returns true if a specified property is in an array:</p><p id="demo"></p><script>const cars = ["Saab", "Volvo", "BMW"];document.getElementById("demo").innerHTML =(0 in cars) + "<br>" +(1 in cars) + "<br>" +(4 in cars) + "<br>" +("length" in cars);</script></body><!-- Mirrored from www.w3schools.com/jsref/tryit.asp?filename=tryjsref_oper_in_arrays3 by HTTrack Website Copier/3.x [XR&CO'2014], Wed, 21 Dec 2022 17:39:12 GMT --></html>