JSFiddle - React, Tailwind, and code Playground

JavaScript

function palindrome(word)
{
    for(var i=0;i<word.length/2;i++)
        if(word.charAt(i)!=word.charAt(word.length-(i+1)))
            return word+" is Not a Palindrome";
    return word+" is Palindrome";
}

alert(palindrome("madam"));
alert(palindrome("madan"));