Typescript uses type annotation to specify the data type of the variable, function or function return value. It uses the syntax :[type], where type is the Typescript type. Once you have annotated an identifier to be of a certain type, you can only use it as that Type. The Typescript compiler throws an error if you use the identifier as a different type.
Typescript Types (or data types) brings static type checking into the dynamic world of Javascript. In this tutorial, we learn what is Typescript types are. We also introduce you to the basic data types that are supported by the typescript.
In the last tutorial, we learned how to create a simple Hello World application using TypeScript. Before going further, we need to learn the Typescript Syntax and basic rules that need to be followed while writing code in TypeScript.
We learned how to create the Hello World Example program in the last tutorial. Every time we make a change in the code, we need to run the tsc HelloWorld.ts to compile it to the Javascript. We can instruct the visual studio code to automatically compile the Typescript file to Javascript file whenever we make changes and save the Source file.
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In this tutorial, let us learn how to build a simple hello world application using typescript. We will show you how to compile it using typescript standalone compiler (tsc) and run it using Node. Before getting started with the hello world application, you must install Typescript compiler, NodeJs and Visual Studio Code. We covered this in the previous tutorial on how to Install Typescript.
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