string.js

// reverse using basic functions
function reverse(string) {
    return string.split("").reverse().join("");
}
console.log(reverse('shoaib'));

// reverse using loop
function reverse(string) {
    var newString = "";
    for (var i = string.length - 1; i >= 0; i--) {
        newString += string[i];
    }
    return newString;
}
console.log(reverse('shoaib'));

// reverse using recursion function
function reverse(string) {
  if (string === "")
    return "";
  else
    return reverse(string.substr(1)) + string.charAt(0);
}
console.log(reverse('shoaib'));