This example demonstrates three distinct ways to define JavaScript functions by computing and logging the squares of numbers 4, 5, and 6 to the console. The page uses standard HTML with embedded CSS for styling and a script block containing the code. It starts with a classic function declaration, then shows a function expression assigned to a variable, and finally an arrow function, illustrating the syntax evolution. The rendering is plain text within a styled div, with all output going to the browser’s developer console rather than the page itself.