Help number combinations

[sally Smith]

Can anyone please help trying to find all number combinations for 7 digits from 0 to 9. Would be a great help.

 

[Urmas]

http://en.wikipedia.org/wiki/Permutation
http://en.wikipedia.org/wiki/Combination

http://en.wikipedia.org/wiki/Factorial
http://en.wikipedia.org/wiki/Binomial_coefficient

http://www.geeksforgeeks.org/write-a-c-program-to-print-all-permutations-of-a-given-string/
http://www.geeksforgeeks.org/print-all-combinations-of-given-length/


What is it I hear? Buses? Hmmmmm...