Python | Filter even values from a list
Given a list of numbers, the task is to make a new list containing only even values.
Examples:
Input: list = [1, 2, 3, 4, 5] Output: [2, 4] Input: list = [12, 14, 95, 3] Output: [12, 14]
Method #1 : Using For loop
Iterate each element in the list using for loop and check if num % 2 == 0. If the condition satisfies, then append it in output list.
# Python code to filter even values from a list # Initialisation of list lis = [1,2,3,4,5] # Output list initialisation out = [] for num in lis: # checking condition if num % 2 == 0: out.append(num) # printing output print(out) |
Output:
[2, 4]
Method #2 : Using While loop
# Python code to filter even values from a list # Initialisation of list lis = [1,2,3,4,5] num = 0 # Output list initialisation out = [] while(num < len(lis)): # checking condition if lis[num] % 2 == 0: out.append(lis[num]) # increment num num += 1 # printing output print(out) |
Output:
[2, 4]
Method #3 : Using list Comprehension
# Python code to filter even values from a list # Initialisation of list lis = [1,2,3,4,5] lis2 = [i for i in lis if i%2 == 0] # Printing output print(lis2) |
Output:
[2, 4]
Method #4 : Using filter()
# Python code to filter even values from a list # Initialisation of list lis1 = [1,2,3,4,5] is_even = lambda x: x % 2 == 0 # using filter lis2 = list(filter(is_even, lis1)) # Printing output print(lis2) |
Output:
[2, 4]
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