Python function to filter even numbers

Python Filter: Exercise-1 with Solution

Write a Python function that filters out even numbers from a list of integers using the filter function.

Sample Solution:

Python Code:

def filter_even_nums(nums):
    """
    Filters out even nums from a list of integers.

    Args:
        nums (list): A list of integers.

    Returns:
        list: A new list containing only the odd numbers.
    """
    # Define the filtering function
    def is_odd(num):
        return num % 2 != 0

    # Use the filter function to filter out even numbers
    odd_nums = list(filter(is_odd, nums))

    return odd_nums

nums = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
print("Original numbers:",nums)
result = filter_even_nums(nums)
print("After filters out even numbers from the said list of integers ")
print(result)  # Output: [1, 3, 5, 7, 9]

Explanation:

In the exercise above -

• The "filter_even_numbers()" function takes a list of integers called numbers as input.
• Inside the function, we define a nested function "is_odd()" that returns True for odd numbers (numbers not divisible by 2).
• Next use the filter function to filter out even numbers from the numbers list by applying the is_odd function as the filtering condition.
• The filtered odd numbers are converted to a list and returned as the result.

Sample Output:

Original numbers: [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
After filters out even numbers from the said list of integers 
[1, 3, 5, 7, 9]

Flowchart:

Python Code Editor:

Previous: Python Filter Exercise Home
Next: Python program to extract uppercase letters.