npm install -g typescript

tsc hello.ts
```shell  

## Documentation

*  [Quick tutorial](http://www.typescriptlang.org/Tutorial)
*  [Programming handbook](http://www.typescriptlang.org/Handbook)
*  [Language specification](http://go.microsoft.com/fwlink/?LinkId=267238)
*  [Homepage](http://www.typescriptlang.org/)

## Building

1.  Install Node if you haven't already (http://nodejs.org/)
2.  Install Jake, the tool we use to build our compiler (https://github.com/mde/jake). To do this, run "npm install -g jake".
3.  To use jake, run one of the following commands: 
    - jake local - This builds the compiler. The output is in built/local in the public directory 
    - jake clean - deletes the build compiler 
    - jake LKG - This replaces the LKG (last known good) version of the compiler with the built one.
        - This is a bootstrapping step to be executed whenever the built compiler reaches a stable state.
    - jake tests - This builds the test infrastructure, using the built compiler. 
    - jake runtests - This runs the tests, using the built compiler and built test infrastructure. 
        - You can also override the host or specify a test for this command. Use host=<hostName> or tests=<testPath>. 
    - jake baseline-accept - This replaces the baseline test results with the results obtained from jake runtests. 
    - jake -T lists the above commands.