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<!DOCTYPE html> <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> </html>
