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I'd like to re-open this question and give the majority of points to this second answer. I'm afraid to click on &quot;Report Question&quot; unless that's the new way to request help.
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I'd like to re-open this question and give the majority of points to this second answer. I'm afraid to click on "Report Question" unless that's the new way to request help.

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Thanks for such a thorough answer!
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I see Typescript can define statically types variable with the word &quot;let&quot;<br />
<br />
how do these two lines differ?<br />
<br />
let name: string = 'Bob';<br />
<br />
name: string = 'Bob';
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I see Typescript can define statically types variable with the word "let"

how do these two lines differ?

let name: string = 'Bob';

name: string = 'Bob';

Typescript: use of word &quot;let&quot;

JavaScript is a dynamic, object-based language commonly used for client-side scripting in web browsers. Recently, server side JavaScript frameworks have also emerged. JavaScript runs on nearly every operating system and  in almost every mainstream web browser.

JavaScript

Web development can range from developing the simplest static single page of plain text to the most complex web-based internet applications, electronic businesses, and social network services using a wide variety of languages and standards, including the familiar HTML, JavaScript and jQuery, ASP and ASP.NET, PHP, ColdFusion, CSS, PHP, Flex and Flash, but also the implementation of a broad list of standards including XML, WSDL, SSDL, VoiceXML and many more.

Web Languages and Standards

A scripting language is a programming language that supports scripts, programs written for a special run-time environment that automate the execution of tasks that could alternatively be executed one-by-one by a human operator. Scripting languages are often interpreted (rather than compiled). Primitives are usually the elementary tasks or API calls, and the language allows them to be combined into more complex programs. Environments that can be automated through scripting include software applications, web pages within a web browser, the shells of operating systems (OS), embedded systems, as well as numerous games. A scripting language can be viewed as a domain-specific language for a particular environment; in the case of scripting an application, this is also known as an extension language.

Scripting Languages

Angular is a JavaScript open-source web application framework used to develop single-page applications. It aims to simplify both the development and the testing of such applications by providing a framework for client-side model–view–controller (MVC) and model–view–view-model (MVVM) architectures, along with components commonly used in rich Internet applications. Angular is the front-end part of the MEAN stack, together with Node.js runtime, Express.js backend framework and MongoDB database.

Typescript: use of word &quot;let&quot;

Typescript: use of word "let"