How to call external program in D

[Sparsh Mittal]

I am new to D.

Can you please tell, how to call external program in D.

Example: in C, one can do this: 
http://stackoverflow.com/questions/43116/how-can-i-run-an-external-program-from-c-and-parse-its-output


I want to call an external program (e.g. ls or date) in D.


Thanks