Is int a JavaScript reserved word?

int is a reserved word in JavaScript. JavaScript contains multiple reserved words: abstract, enum, int, short, boolean, export, interface, static, byte, extends, long, super, etc.

The operating environment of this tutorial: windows7 system, javascript version 1.8.5, Dell G3 computer.

Reserved words are a set of names (or commands) prepared for use within the JavaScript language specified by ECMA-262. These names currently have no specific purpose and are reserved for JavaScript upgrade versions. Users are advised not to use them. Specific instructions are shown in the table.

ECMAScript reserved words

abstract	double	goto	native	static
boolean	enum	implements	package	super
byte	export	import	private	synchronized
char	extends	int	protected	throws
class	final	interface	public	transient
const	float	long	short	volatile

ECMAScript 3 lists all Java keywords as reserved words, while ECMAScript 5 has more flexible regulations.

For example, in non-strict mode, only class, const, enums, export, extends, import, and super are reserved words, and other ECMAScript 3 reserved words can be used freely; in strict mode, ECMAScript 5 becomes Be more cautious and strictly limit the use of implements, interface, let, package, private, protected, public, static, yield, eval (non-reserved words), and arguments (non-reserved words).

Note:

Using keywords as identifiers in code will cause an "Identifier Expected" (missing identifier) ​​error in most browsers. Using reserved words may not cause the same error, depending on the browser. In general, it is best not to use keywords and reserved words as identifiers to maintain compatibility with future versions of ECMAScript.

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