Q:

Find the number occurring odd number of times using lambda expression and reduce() function in Python

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mahmoud2506
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2022-05-23
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Example:

Input: 
list1 = [10, 20, 10, 30, 30, 20, 20]

Output:
20
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mahmoud2506
2022-05-23
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Python code to find the number occurring odd number of times using lambda expression and reduce() function

Define a lambda function and use reduce() function over the list until the single value is left expression reduces the value of x ^ y into single value x starts from 0 and y from 1.

# Importing redecue() function

from functools import reduce

def findElement(list1):
	print (reduce(lambda x, y: x ^ y, list1))

# Main function
if __name__ == "__main__":
	list1 = [10, 20, 10, 30, 30, 20, 20]
	findElement(list1)

Output:

20

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