How do you create functions in JavaScript?

In JavaScript, you create functions using the function keyword followed by the function name, parameters in parentheses, and the function body in curly braces. For example:

function functionName(parameters) {
  // Function body
  // ...
}

A JavaScript function is defined with the function keyword, followed by a name, followed by parentheses (). Function names can contain letters, digits, underscores, and dollar signs (same rules as variables). The parentheses may include parameter names separated by commas: (parameter1, parameter2, …)