human
Find the Missing Number | getMissingNo takes list as argument.
Driver program to test above function"
Solution in Python:

Write me a code to find the Missing Number and the other steps required?
assistant
#Here is code to find the Missing Number and the other steps required.
 def getMissingNo ( a , n ) :
	n_elements_sum = n * ( n + 1 ) // 2
	return n_elements_sum - sum ( a )
if __name__ == ' _ _ main _ _ ' :
	a = [ 1 , 2 , 4 , 5 , 6 ]
	n = len ( a ) + 1
	miss = getMissingNo ( a , n )
	print ( miss )