const reverseString = (str) => { if (str === "") { return ""; } else { return reverseString(str.substr(1)) + str.charAt(0); } }; const reverseString2 = (str) => { let arrayStr = str.split(""); let reverse = []; function addToArray(array) { if (array.length > 0) { reverse.push(array.pop()); addToArray(array); } return; } addToArray(arrayStr); return reverse.join(""); }; console.log(reverseString("kishor rathva")); console.log(reverseString2("kishor rathva")); // console.log(first);