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Python program to count Even and Odd numbers in a List

  • Difficulty Level : Basic
  • Last Updated : 26 Oct, 2018

Given a list of numbers, write a Python program to count Even and Odd numbers in a List.

Example:

Input: list1 = [2, 7, 5, 64, 14]
Output: Even = 3, odd = 2

Input: list2 = [12, 14, 95, 3]
Output: Even = 2, odd = 2

Example 1: count Even and Odd numbers from given list using for loop

Iterate each element in the list using for loop and check if num % 2 == 0, the condition to check even numbers. If the condition satisfies, then increase even count else increase odd count.




# Python program to count Even
# and Odd numbers in a List
  
# list of numbers
list1 = [10, 21, 4, 45, 66, 93, 1]
  
even_count, odd_count = 0, 0
  
# iterating each number in list
for num in list1:
      
    # checking condition
    if num % 2 == 0:
        even_count += 1
  
    else:
        odd_count += 1
          
print("Even numbers in the list: ", even_count)
print("Odd numbers in the list: ", odd_count)
Output:
Even numbers in the list:  3
Odd numbers in the list:  4

Example 2: Using while loop




# Python program to count Even and Odd numbers in a List
  
# list of numbers
list1 = [10, 21, 4, 45, 66, 93, 11]
  
even_count, odd_count = 0, 0
num = 0
  
# using while loop     
while(num < len(list1)):
      
    # checking condition
    if list1[num] % 2 == 0:
        even_count += 1
    else:
        odd_count += 1
      
    # increment num 
    num += 1
      
print("Even numbers in the list: ", even_count)
print("Odd numbers in the list: ", odd_count)
Output:
Even numbers in the list:  3
Odd numbers in the list:  4

Example 3 : Using Python Lambda Expressions




# list of numbers
list1 = [10, 21, 4, 45, 66, 93, 11]
  
odd_count = len(list(filter(lambda x: (x%2 != 0) , list1)))
  
# we can also do len(list1) - odd_count
even_count = len(list(filter(lambda x: (x%2 == 0) , list1)))
  
print("Even numbers in the list: ", even_count)
print("Odd numbers in the list: ", odd_count)
Output:
Even numbers in the list:  3
Odd numbers in the list:  4

Example 4 : Using List Comprehension




# Python program to print odd Numbers in a List
   
# list of numbers
list1 = [10, 21, 4, 45, 66, 93, 11]
   
only_odd = [num for num in list1 if num % 2 == 1]
odd_count = len(only_odd)
   
print("Even numbers in the list: ", len(list1) - odd_count)
print("Odd numbers in the list: ", odd_count)
Output:
Even numbers in the list:  3
Odd numbers in the list:  4

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