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How come in the javascript console you type Math.round(2.2) without a semicolon at the end?

Math objects

1 Answer

28,521 Points

The instructor likely just forgot to include it. In JavaScript (unlike languages like C++, Java or C#) semicolons are not actually mandatory. They are only strictly required if you want to have multiple statements placed on the same line. If you don't have multiple statements on one line then not including a semicolon is completely accepted by JavaScript.

However always using semicolons is considered a standard and good practice. On the console it doesn't really matter since the code isn't going to be saved anywhere anyway, but when writing scripts you should include them.