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  1. Imports System
  2. Public Class Pascalls_Triangle
  3. 	Public Shared Sub Main()
  4. 		'Returns the number at the location inside pascalls triangle
  5. 		console.writeline(Pascalls_Return_n_Of_k(4,2))
  6. 	End Sub
  7.  
  8. 	Public Shared Function Return_Factorial_Of_n(Byval n as Integer)
  9. 		'n! = n * (n-1)... * 3 * 2 * 1
  10. 		dim nFactorial as uint64 = 1
  11. 		for i as uint64 = n  to 1 step -1
  12. 			nFactorial *= i
  13. 		Next
  14. 		Return nFactorial
  15. 	End Function
  16.  
  17. 	Public Shared Function Pascalls_Return_n_Of_k(Byval n as int64, Byval k as int64)
  18. 		'(n choose k) = n!/k!*(n - k)!
  19. 		'Example: n = Row, k = Term
  20. 		'      1          - Row(0)
  21. 		'     1 1         - Row(1)
  22. 		'    1 2 1        - Row(2)
  23. 		'   1 3 3 1       - Row(3)
  24. 		'  1 4 6 4 1      - Row(4)
  25. 		'
  26. 		'  ' ' ' ' '
  27. 		'  ' ' ' ' Term(4)
  28. 		'  ' ' ' Term(3)
  29. 		'  ' ' Term(2)
  30. 		'  ' Term(1)
  31. 		'  Term(0)
  32. 		Return (Return_Factorial_Of_n(n) / (Return_Factorial_Of_n(k) * Return_Factorial_Of_n(n-k)))
  33. 	End Function
  34. end class
Runtime error #stdin #stdout 0.08s 36328KB
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stdout 
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https://ideone.com/FdEiX
language:
VB.NET (mono-3.10)
created:
14 years ago
visibility:
public

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