Javascript: difference between a statement and an expression?

Are all statements also expressions?

“Wherever JavaScript expects a statement, you can also write an expression. Such a statement is called an expression statement. The reverse does not hold: you cannot write a statement where JavaScript expects an expression. For example, an if statement cannot become the argument of a function.”

This is comes from a recent post by Axel Rauschmayer about this topic: Expressions versus statements in JavaScript

Hope it helps.

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