var sentence = 'The quick brown fox jumps over the lazy dog.';
console.log(sentence.toUpperCase());
// expected output: "THE QUICK BROWN FOX JUMPS OVER THE LAZY DOG."
var sentence = 'The quick brown fox jumps over the lazy dog.';console.log(sentence.toUpperCase());// expected output: "THE QUICK BROWN FOX JUMPS OVER THE LAZY DOG."