how to write a program loop

*Subject*: [mg2545] how to write a program loop*From*: ewalke1 at gl.umbc.edu ("Enrico C. Walker")*Date*: Fri, 17 Nov 1995 05:21:05 GMT*Approved*: usenet@wri.com*Distribution*: local*Newsgroups*: wri.mathgroup*Organization*: University of Maryland, Baltimore County*Sender*: daemon at wri.com ( )

How do I write a program loop to find a power of n (n^x) where x is about 200 digits. I know that my equation will blow-up if plug-in directly : 200^x ; where x is 200 digits. so I want to find the result by using iterations -i.e. 2^4 = 2^(2)*2 = 16 Please advise.