The simplest kind of statement is the null statement, consisting of just a semicolon:
It doesn't do anything at all, but it does it very quickly.
The next simplest statement is also one of the most common, the expression statement, consisting of any expression followed by a semicolon:
The given expression is evaluated and the resulting value is ignored. Commonly-used kinds of expressions for such statements include assignments and verb calls. Of course, there's no use for such a statement unless the evaluation of expression has some side-effect, such as changing the value of some variable or property, printing some text on someone's screen, etc.
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