JSFiddle - React, Tailwind, and code Playground

by Serhii Tymchak

JavaScript

function Word (str) {
    if (str.charAt(0) == 0) return str = "You can not enter empty string"; 
    return str[0].toUpperCase() + str.slice(1); 
}

var str = prompt ("Enter string ", "");
alert (Word(str));