Let’s learn about procedures in JavaScript.

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What are procedures?

Generally, a parametrized procedure is like a subprogram that can be called with a certain number of arguments any number of times from within a program. Whenever a procedure returns a value, it’s called a function. In OOP, procedures are called methods if they’re defined in the context of a class or an object.

In JavaScript, procedures are called functions, whether they return a value or not. JavaScript functions are special JS objects that have an optional name property and a length property that provide a number of parameters. Whether or not a v variable references a function can be tested as follows:

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