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Python: Built-in Functions vs. For & If Loops – 5 Programs Explained

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Python’s built-in functions make coding fast and efficient. But understanding how they work under the hood is crucial to mastering Python. This post shows five Python tasks, each implemented in two ways: Using built-in functions Using for loops and if statements ✅ 1. Sum of a List ✅ Using Built-in Function: numbers = [ 10 , 20 , 30 , 40 ] total = sum (numbers) print ( "Sum:" , total) 🔁 Using For Loop: numbers = [ 10 , 20 , 30 , 40 ] total = 0 for num in numbers: total += num print ( "Sum:" , total) ✅ 2. Find Maximum Value ✅ Using Built-in Function: values = [ 3 , 18 , 7 , 24 , 11 ] maximum = max (values) print ( "Max:" , maximum) 🔁 Using For and If: values = [ 3 , 18 , 7 , 24 , 11 ] maximum = values[ 0 ] for val in values: if val > maximum: maximum = val print ( "Max:" , maximum) ✅ 3. Count Vowels in a String ✅ Using Built-ins: text = "hello world" vowel_count = sum ( 1 for ch in text if ch i...

Best Practices for Handling Duplicate Elements in Python Lists

Here are three awesome ways that you can use to remove duplicates in a list. These are helpful in resolving your data analytics solutions.


Methods to remove list duplicates


 01. Using a Set

Convert the list into a set, which automatically removes duplicates due to its unique element nature, and then convert the set back to a list.


Solution:

original_list = [2, 4, 6, 2, 8, 6, 10]

unique_list = list(set(original_list))


02. Using a Loop

Iterate through the original list and append elements to a new list only if they haven't been added before.

Solution:

original_list = [2, 4, 6, 2, 8, 6, 10]

unique_list = []

for item in original_list:

    if item not in unique_list:

        unique_list.append(item)


03. Using List Comprehension

Create a new list using a list comprehension that includes only the elements not already present in the new list.


Solution:

original_list = [2, 4, 6, 2, 8, 6, 10]

unique_list = []

[unique_list.append(item) for item in original_list if item not in unique_list]

All three methods will result in unique_list containing only the distinct elements from the original_list. Keep in mind that the order of elements might not be preserved using the set approach as sets are unordered collections. The loop and list comprehension methods will maintain the order of the elements.


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