I do that using the for each function // write a functino to show the longest string from array const names = ["Noman", "John", "Wickago", "Omarfaru", "Faruk", "Shahin"]; function findSting(names) { let max = 0; let name, size; names.forEach(function (item) { if (item.length > max) { max = item.length; name = item; size = max; } }) return ` Longest name: ${name} and Size: ${size}`; } console.log(findSting(names));