tion declarations as they are akin to how functions are declared in other languages. Others
prefer function expressions because it is clear that functions are just another value assigned
to a variable, rather than a special feature of the language. Whether you use function declar-
ations or function expressions is often a matter of personal taste, but whatever you choose
to do―be consistent!
Invoking a Function
Invoking a function is to run the code inside the function's body. To invoke a function,
simply enter its name, followed by parentheses. This is how we'd invoke the hello func-
tion, for example:
<< "Hello world!"
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