Pro 6.cpp

The following program takes a number ( any natural number ) from the user. e.g 5. Then calculates the factorial of 5! 
As in 5*4*3*2*1 . And (a) will always be equal to 1 so the factorial ends at 1 not exceed after 1. And display the result e.g
5!=120.
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Merge pull request #1 from Syed-Adees/Pro-6.cpp

Pro 6.cpp