javascript/13.strings.stringObjects.html at Javascript-basics · Supriya1659/javascript · GitHub

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<!DOCTYPE html>
<html lang="en">

<head>
   <meta charset="utf-8">
   <meta http-equiv="X-UA-Compatible" content="IE=edge">
   <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">

    <title>Title</title>
</head>

<body>
<h1>Strings - String Objects</h1>
<script>
    var s1="Welcome to Strings in 'JavaScript'";
    document.writeln("DOUBLE QUOTED STRING: ",s1,"<br>");
    var s2='String with single Quote with "Double Quotations in it"';
    document.writeln("SINGLE QUOTED STRING: ",s2,"<br>");
    document.writeln(typeof s2,"<br>");
    var s3 = new String("This is String Object<br>");
    document.writeln("STRING OBJECT: ", s3);
    document.writeln(typeof s3,"<br>");

    document.writeln("<h1>String Methods</h1>");
    document.writeln("<h2>");
    document.writeln("s1 = ",s1, "<br> s2 = ",s2,"<br> s3 = ",s3 );

    document.writeln("indexOf() - position of z in s1 is ", s1.indexOf("z"),"<br>");
    document.writeln("indexOf() - position of o in s1 is ", s1.indexOf("o"),"<br>");
    document.writeln("last indexOf() - position of o in s1 is ", s1.lastIndexOf("o"),"<br>");
    document.writeln("indexOf() with one argument - position of o in s1 is ", s1.indexOf("o",6),"<br>");
    document.writeln("serach() of o: - ",s1.search("o"),"<br>");
    document.writeln("slice() - Extracting from s1: ",s1.slice(0,6),"<br>");
    document.writeln("slice() - Extracting from s1 with negative index: ",s1.slice(0,-6),"<br>");
    document.writeln("substring() - Extracting from s1 : ",s1.substring(0,17),"<br>");
 // difference between slice and substring is slice accepts negative index but
 // substring won't
  // substr() also accepts the negative indexes
  document.writeln("substr() - Extracting from s1: ",s1.substr(0,6),"<br>");
  document.writeln("replace() - Replacing s in s1: ",s1.replace("JavaScript", "JS"),"<br>");

  var s4 ="welcome to javascript";
  var s5 = s4.toUpperCase();
  document.write(s5,"<br>");
  document.write(s5.toLowerCase(),"<br>");
  var s6="Hello!";
  document.write(s6.concat(s4),"<br>");

  var s7="   Java Script   ";
  document.writeln("LENGTH OF S7 : ",s7.length,"<br>");
  var s8 = s7.trim();
  document.writeln("LENGTH OF S8 : ",s8.length,"<br>");

  document.writeln("charAt() - ", s1.charAt(5),"<br>");
  document.writeln("s1 length: ", s1.length,"<br>");
  document.writeln("charAt() - ", s1.charAt(39),"<br>");

  document.writeln("charCodeAt() - ", s1.charCodeAt(5),"<br>");

  // for accessing each character
  for(i=0;i<s8.length;i++){
    document.writeln(s8[i]+"<br>");
  }
</script>

</body>
</html>