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Given the following text description, write Python code to implement the functionality described.
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Description:
Number of n
Returns factorial of n ; returns nCr ; Driver code

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Python Code:
def fact(n ) : 
	 res = 1 
 for i in range(2 , n + 1 ) : 
	 res = res * i 
  return res 
  def nCr(n , r ) : 
	 return fact(n ) //(( fact(r ) * fact(n - r ) ) ) 
  n = 2 
 print("Number ▁ of ▁ Non - Decreasing ▁ digits : ▁ ", nCr(n + 9 , 9 ) ) 

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