Sample program using TypeScript

Before going further, look here for some basic concepts of TypeScript.

Below is a sample program using TypeScript. Save this program with, say HelloWorld.ts

   
var firstname:string = "Akanksha"
console.log(firstname)

When compiled, this code will be converted to JavaScript and a new file is created in the same folder with the same name, but with .js extension (HelloWorld.js)

   
var value = "Hello World!!";
console.log(value);

Open NodeJS Command Prompt.
Go to the folder where you have saved your TypeScript file.
Write tsc HelloWorld.ts
Above code will compile your code in .js file.

Then Write node HelloWorld.js
Above code will execute .js file and displays the result. Remember to use .js as extension.