Data Structure
Networking
RDBMS
Operating System
Java
MS Excel
iOS
HTML
CSS
Android
Python
C Programming
C++
C#
MongoDB
MySQL
Javascript
PHP
Physics
Chemistry
Biology
Mathematics
English
Economics
Psychology
Social Studies
Fashion Studies
Legal Studies
- Selected Reading
- UPSC IAS Exams Notes
- Developer's Best Practices
- Questions and Answers
- Effective Resume Writing
- HR Interview Questions
- Computer Glossary
- Who is Who
Python program to Count Even and Odd numbers in a List
In this article, we will learn about the solution to the problem statement given below.
Problem statement − We are given a list, we need to count even and odd numbers in a list.
There are three methods as discussed below−
Approach 1 − Using brute-force approach
Example
list1 = [21,3,4,6,33,2,3,1,3,76]
even_count, odd_count = 0, 0
# enhanced for loop
for num in list1:
#even numbers
if num % 2 == 0:
even_count += 1
#odd numbers
else:
odd_count += 1
print("Even numbers available in the list: ", even_count)
print("Odd numbers available in the list: ", odd_count)Output
Even numbers available in the list: 4 Odd numbers available in the list: 6
Approach 2 − Using filter() and lambda expressions
Example
list1 = [21,3,4,6,33,2,3,1,3,76]
#odd numbers
odd_count = len(list(filter(lambda x: (x%2 != 0) , list1)))
#even numbers
even_count = len(list(filter(lambda x: (x%2 == 0) , list1)))
print("Even numbers available in the list: ", even_count)
print("Odd numbers available in the list: ", odd_count)Output
Even numbers available in the list: 4 Odd numbers available in the list: 6
Approach 3 − Using the list comprehension
Example
list1 = [21,3,4,6,33,2,3,1,3,76]
#copy of list elements which are odd in a new list and calculating
the length on new list
only_odd = [num for num in list1 if num % 2 == 1]
odd_count = len(only_odd)
print("Even numbers available in the list: ", len(list1) -
odd_count)
print("Odd numbers available in the list: ", odd_count)Output
Even numbers available in the list: 4 Odd numbers available in the list: 6
Conclusion
In this article, we have learned how to count even and odd numbers in a list.
Updated on: 11-Jul-2020
4K+ Views
Advertisements