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In JavaScript, a semicolon is used to indicate the end of a statement, or to separate three paragraphs in a for statement, while a comma is used to separate two clauses, or to separate parameters in a function definition or call.

The operating environment of this tutorial: windows10 system, javascript1.8.5 version, Dell G3 computer.

What is the difference between a semicolon and a comma in javascript

In javascript: a semicolon usually indicates the end of a statement, or is used to separate three paragraphs in a for statement; a comma is usually used to separate two clauses, or to separate parameters in a function definition or call.

Such as:

Var I = 0, j = 2 * for (var kappa 0; k < j; kappa +) {I = I + round (4 * (k + 1) * 3.14159, 2);}

Like many plug-ins, the js begins with a semicolon to avoid possible errors in the interpreter if you merge the following js files.

/ / code block Avar a = 10 × var b = 5 * * var c = a + b hand / code block B ('x' +'y') .toString ()

Just put a semicolon before ('x'+'y') .toString ().

/ / code block Avar a = 10 × var b = 5 * * var c = a + b hand / code block B; ('x'+'y') .toString ()

So, what an important thing the semicolon is.

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