1

I want the text to be printed without commas.

<html>
<head>
<title>Reverse</title>
</head>
<body>
<form name="rev">
Enter the string : <input type="text" name="str"/>
<input type="button" value="click" onclick="rev1()" /><br>
reverse of given string : <input type="text" name="res"/>
</form>
<script type="text/JavaScript">
function rev1(){
var a=rev.str.value;
var b=[];
var i,j=0;
 for(i=a.length-1;i>=0;i--){
 b[j]=a[i];
 j++
}
//rev.res.value=b;
alert(b);
}
</script>
</body>
</html>

If I give the input as abc I am getting an output as c,b,a, but I want it as cba.

Alex
9,5011 gold badge41 silver badges45 bronze badges
asked Jul 29, 2012 at 12:01
1
  • [].toString() is implemented as [].join() (which uses a comma as a separator, by default, ie [].join(','). Commented Jul 29, 2012 at 12:07

3 Answers 3

13

Try this:

alert( b.join("") )

You could also reverse a string more easily by:

"hello".split("").reverse().join("")
//"olleh"
answered Jul 29, 2012 at 12:04
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Comments

3

  1. You may reverse your string using javascript built-in functions:

     <html>
 <head>
 <title>Reverse</title>
 </head>
 <body>
 <form name="rev">
 Enter the string : <input type="text" name="str"/>
 <input type="button" value="click" onclick="rev1()" /><br>
 reverse of given string : <input type="text" name="res"/>
 </form>
 <script type="text/JavaScript">
 function rev1(){
 var a=rev.str.value;
 var b=a.split("").reverse().join("");
 //rev.res.value=b;
 alert(b);
 }
 </script>
 </body>
 </html>

  2. You may also transfer join your array elements to become a string

     <html>
 <head>
 <title>Reverse</title>
 </head>
 <body>
 <form name="rev">
 Enter the string : <input type="text" name="str"/>
 <input type="button" value="click" onclick="rev1()" /><br>
 reverse of given string : <input type="text" name="res"/>
 </form>
 <script type="text/JavaScript">
 function rev1(){
 var a=rev.str.value;
 var b=[];
 var i,j=0;
 for(i=a.length-1;i>=0;i--){
 b[j]=a[i];
 j++
 }
 //rev.res.value=b;
 alert(b.join(""));
 }
 </script>
 </body>
 </html>
answered Jul 29, 2012 at 12:10

Comments

0

You can also use document.getElementById().value.reverse().join("");

Tamil Selvan C
20.3k12 gold badges55 silver badges72 bronze badges
answered Jan 28, 2014 at 16:28

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