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P. 379
10. Write a JavaScript code to check whether a string is a palindrome.
Ans. <!DOCTYPE html>
<HTML>
<HEAD>
<TITLE>PALINDROME CHECKER</TITLE>
</HEAD>
<BODY>
<H1>PALINDROME CHECKER</H1>
<SCRIPT>
function checkpalindrome() {
var str = document.getElementById("INPUTSTRING").value;
var reversedstr = "";
for (var i = str.length - 1; i >= 0; i--) {
reversedstr += str.charAt(i);
}
if (str === reversedstr) {
document.getElementById("RESULT").innerHTML = str + " is a palindrome!";
} else {
document.getElementById("RESULT").innerHTML = str + " is not a palindrome!";
}}
</SCRIPT>
<INPUT TYPE="TEXT" ID="INPUTSTRING" PLACEHOLDER="ENTER A STRING IN LOWERCASE">
<BUTTON ONCLICK="checkpalindrome()">CHECK</BUTTON>
<P ID="RESULT"></P>
</BODY>
</HTML>
Output of the preceding code is as follows:
11. Write a JavaScript code to print even length words in a string
Ans. <!DOCTYPE html>
<HTML>
<HEAD>
<TITLE>Print Even Length Words</TITLE>
Practical Work 377

