function helloWorld() { console.log("Hello, world!"); }
function addNumbers(a, b) { return a + b; }
function square(x) { return x * x; }
console.log("This code block has a copy button!");
function helloWorld() { console.log("Hello, world!"); }
function addNumbers(a, b) { return a + b; }
function square(x) { return x * x; }
console.log("This code block has a copy button!");