how to set string in variable in javascript code example

Example 1: how to put variable in string javascript

var myInt = 1
console.log(`my variable is ${myInt}`);
// my variable is 1

Example 2: how to use string variable in javascript

<html>
   <head>
      <title>JavaScript Strings</title>
   </head>
   <body>
      <script>
         var re = "java";
         var str = "Learn java";
         if ( str.search(re) == -1 ){
            document.write("Not found!" );
         } else {
            document.write("Found!" );
         }
     </script>
   </body>
</html>

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