Exercise/2.htm at master · KalariaYash/Exercise · GitHub

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<!-- Write a JavaScript program to create a new string from a given string changing the position of first and last characters. The string length must be greater than or equal to 1 -->
<!DOCTYPE html>
<html>

  <head> </head>

  <body>
    <script>
       let originalString = prompt( "Enter the string atleast of length 1", "Enter a string" );
       if ( originalString == null ) {
         alert ( "Please enter a valid string" );
       }
       else if ( originalString.length == 1 ) {
         alert ( originalString );
       }
       else {
         let last = originalString.charAt(originalString.length - 1) ;
         let temporaryString = last + originalString.slice (1, originalString.length - 1) ;
         let finalString = temporaryString.slice (0, temporaryString.length) + originalString.charAt(0);
           alert (finalString);
       }
    </script>
  </body>

</html>