JavaScript строчная строка
var str = "My Big Boy!"
var res = str.toLowerCase(); //res is "my big boy!"
Grepper
var str = "My Big Boy!"
var res = str.toLowerCase(); //res is "my big boy!"var str = "Hello World!";
var res = str.toLowerCase();let text1 = "Hello World!"; // String
let text2 = text1.toLowerCase(); // text2 is text1 converted to lower