リスト内の偶数と奇数をカウントするPythonプログラム

例

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)

出力

Even numbers available in the list: 4
Odd numbers available in the list: 6

アプローチ2-filter（）とラムダ式の使用

例

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)

出力

Even numbers available in the list: 4
Odd numbers available in the list: 6

アプローチ3-リスト内包表記の使用

例

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)

出力

Even numbers available in the list: 4
Odd numbers available in the list: 6

結論

この記事では、リスト内の偶数と奇数を数える方法を学びました。