Count ways to reach the n'th stair Python

PROGRAM TO COUNT WAYS TO REACH THE N'TH STAIR



n = 5
 
# Here n/2 is done to count the number 2's in n
# 1 is added for case where there is no 2.
# eg: if n=4 ans will be 3.
# {1,1,1,1} set having no 2.
# {1,1,2} ans {2,2} (n/2) sets containing 2.
print("Number of ways when order "
      "of steps does not matter is : ", 1 + (n // 2)) 

OUTPUT:
Number of ways when order of steps does not matter is : 3

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