{"id":59626,"date":"2018-05-02T16:04:24","date_gmt":"2018-05-02T10:34:24","guid":{"rendered":"https:\/\/www.vskills.in\/certification\/tutorial\/?p=59626"},"modified":"2024-04-12T14:13:20","modified_gmt":"2024-04-12T08:43:20","slug":"typescript-types","status":"publish","type":"page","link":"https:\/\/www.vskills.in\/certification\/tutorial\/typescript-types\/","title":{"rendered":"TypeScript Types"},"content":{"rendered":"

TypeScript Types<\/h1>\n

For programs to be useful, we need to be able to work with some of the simplest units of data: numbers, strings, structures, boolean values, and the like. In TypeScript, we support much the same types as you would expect in JavaScript, with a convenient enumeration type thrown in to help things along.<\/p>\n

Boolean<\/h1>\n

The most basic datatype is the simple true\/false value, which JavaScript and TypeScript call a boolean<\/code> value.<\/p>\n

let<\/span> isDone: boolean<\/span> = false<\/span>;\r\n<\/code><\/pre>\n
Number<\/h1>\n
As in JavaScript, all numbers in TypeScript are floating point values. These floating point numbers get the type number<\/code>. In addition to hexadecimal and decimal literals, TypeScript also supports binary and octal literals introduced in ECMAScript 2015.<\/p>\n
let<\/span> decimal: number<\/span> = 6<\/span>;\r\nlet<\/span> hex: number<\/span> = 0xf00d<\/span>;\r\nlet<\/span> binary: number<\/span> = 0b1010<\/span>;\r\nlet<\/span> octal: number<\/span> = 0o744<\/span>;\r\n<\/code><\/pre>\n
String<\/h1>\n
Another fundamental part of creating programs in JavaScript for webpages and servers alike is working with textual data. As in other languages, we use the type string<\/code> to refer to these textual datatypes. Just like JavaScript, TypeScript also uses double quotes (\"<\/code>) or single quotes ('<\/code>) to surround string data.<\/p>\n
let<\/span> color: string<\/span> = \"blue\"<\/span>;\r\ncolor = 'red'<\/span>;\r\n<\/code><\/pre>\n
You can also use template strings<\/em>, which can span multiple lines and have embedded expressions. These strings are surrounded by the backtick\/backquote (`<\/code>) character, and embedded expressions are of the form ${ expr }<\/code>.<\/p>\n
let<\/span> fullName: string<\/span> = `Bob Bobbington`;\r\nlet<\/span> age: number<\/span> = 37<\/span>;\r\nlet<\/span> sentence: string<\/span> = `Hello, my name is ${ fullName }.\r\n\r\nI'll be ${ age + 1 } years old next month.`;\r\n<\/span><\/code><\/pre>\n
IT Professionals, Web Developers, Web Programmers, IT students can Apply for the certification course to move ahead in their careers.<\/strong><\/p>\n
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