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<html><body><h1>JavaScript Strings</h1><h2>The substr() Method</h2><p>substr() extracts a part of a string:</p><p id="demo"></p><script>let text = "Hello world!"; let result = text.substr(0, 1);document.getElementById("demo").innerHTML = result;</script></body><!-- Mirrored from www.w3schools.com/jsref/tryit.asp?filename=tryjsref_substr3 by HTTrack Website Copier/3.x [XR&CO'2014], Wed, 21 Dec 2022 17:39:26 GMT --></html>