Reversing the string by suing the substr : substr « String « JavaScript Tutorial






  1. JavaScript Tutorial
  2. String
  3. substr
<HTML>
<HEAD>
<SCRIPT>
function revString(str) {
   retStr = "";
   strArray = new Array(str.split(""));
   for (i=str.length - 1 ; i > - 1 ; i--){
      retStr += str.substr(i,1);
   }
   return retStr;
}

</SCRIPT>
</HEAD>
<BODY>
<FORM name="theForm">
Enter a text string:
<TEXTAREA name=inStr rows=5 cols=90>
</TEXTAREA>
<INPUT type=button value="Reverse String" onClick="document.theForm.results.value = revString(document.theForm.inStr.value)";>
<INPUT type=button name="theButton" value="Clear Results" onClick='document.theForm.results.value=""';>
Results<br>
<TEXTAREA name=results rows=5 cols=90>
</TEXTAREA>

</FORM>  
</BODY>
</HTML>








6.30.substr
6.30.1.String.substr()
6.30.2.Reversing the string by suing the substr