name<\/code> and display a custom greeting in the console:<\/p>\n\nfunction greet(name) { console.log("Hello, " + name + "!"); }\n<\/pre>\nOnce a function is defined, it can be called or invoked to execute its code. In the case of the function greet<\/code>, we can call it by passing a name as an argument:<\/p>\n\ngreet("John");\n<\/pre>\nThis will display "Hello, John!" on the console. Functions can also return a value using the keyword return<\/code>. For example, we can modify the function greet<\/code> so that it returns the greeting instead of displaying it directly:<\/p>\n\nfunction greet(name) { return "Hello, " + name + "!"; }\n<\/pre>\nWe can store the result of the function in a variable and use it in other parts of our code:<\/p>\n
\nvar greeting = greet("John"); console.log(greeting);\n<\/pre>\nThis will display "Hello, John!" in the console, just like before.<\/p>\n