Compiling a Typescript file using the command-line

Please read the post about downloading the latest Typescript here.

Once you have downloaded Typescript file, you can compile it using the command tsc from the C:\ prompt.

Here is a Typescript file, Person.ts:
--------------------------------
interface Person {
    age: number,
    name: string,
    say(): string
}

let mike = {
    age: 25,
    name:"Mike",
    say: function() {
        return "My name is " + this.name +
               " and I'm " + this.age + " years old!"
    }
}

function sayIt(person: Person) {
    return person.say();
}
--------------------
Save it to a location of your choice as shown.

Typescriptsample_0

Now compile it using the command tsc as shown here:
----------

C:\Users\Owner> tsc Person.ts

C:\Users\Owner>dir
------------
The program compiles it to a JavaScript file as shown:
-----------

Typescriptsample_1.png

The JavaScript file now reads as shown:
-------------
var mike = {
    age: 25,
    name: "Mike",
    say: function () {
        return "My name is " + this.name +
            " and I'm " + this.age + " years old!";
    }
};
function sayIt(person) {
    return person.say();
}
console.log(sayIt(mike));
--------------------------------
Notice the strong typing in the Typescript file.