Binary and octal literals


The following table summarizes the methods of Number. The built-in Math object has properties and methods for mathematical constants and functions. For example, the Math object's PI property has the value of pi 3. Similarly, standard mathematical functions are methods of Math. These include trigonometric, logarithmic, exponential, and other functions. For example, if you want to use the trigonometric function sine, you would write. Unlike many other objects, you never create a Math object of your own.

You always use the built-in Math object. JavaScript does not have a date data type. However, you can use the Date object and its methods to work with dates and times in your applications. The Date object has a large number of methods for setting, getting, and manipulating dates. It does not have any properties. JavaScript handles dates similarly to Java. The two languages have many of the same date methods, and both languages store dates as Unix Timestamp which is the number of milliseconds since January 1, , Calling Date without the new keyword returns a string representing the current date and time.

The Date object methods for handling dates and times fall into these broad categories:. With the "get" and "set" methods you can get and set seconds, minutes, hours, day of the month, day of the week, months, and years separately. There is a getDay method that returns the day of the week, but no corresponding setDay method, because the day of the week is set automatically.

These methods use integers to represent these values as follows:. The getTime and setTime methods are useful for comparing dates. The getTime method returns the number of milliseconds since January 1, , Hexadecimal numbers, which pack so neatly into bytes, are also of special interest.

But why restrict ourselves to radices 10, 16, 8 and 2? A bit of Googling found this suggestion from Andrew Koenig on a Python mail list archive:. I am personally partial to allowing an optional radix in decimal followed by the letter r at the beginning of a literal, so 19, 8r23, and 16r13 would all represent the same value. You did notice the Latin Capital Letter O didn't you?

Word Aligned sweating the small stuff. Each one specifies a two-byte character in the UTF encoding. For codepoints between 0 and FFFF, the digits are identical to the codepoint. Higher codepoints require two escape sequences representing the surrogate pair used to encode the character; the surrogate pair is distinct from the codepoint.

With Unicode code point escapes, any character can be escaped using hexadecimal numbers so that it is possible to use Unicode code points up to 0x10FFFF. With simple Unicode escapes it is often necessary to write the surrogate halves separately to achieve the same. See also RegExp for more information. See also template strings for more information. Some JavaScript statements must be terminated with semicolons and are therefore affected by automatic semicolon insertion ASI:. A semicolon is inserted at the end, when a statement with restricted productions in the grammar is followed by a line terminator.

These statements with "no LineTerminator here" rules are:. Get the latest and greatest from MDN delivered straight to your inbox.

Please check your inbox or your spam filter for an email from us. The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https: Binary numeric literals 0b 41 41 12 25 28 Yes?

Octal numeric literals 0o 41 41 12 25 28 Yes? Shorthand notation for object literals 43 43 12 33 30? Template literals 41 41 12 34 28? Document Tags and Contributors Tags: Contributors to this page: Erutuon , fscholz , mistoken , nmve , kdex , lewisje , fasttime , Pointy , stevemao , michaelficarra , merih , Hywan , akinjide , KiraAndMaxim , realityking , jpmedley , RogerPoon , shvaikalesh , zzmp , williampower.