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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...
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Vi Editor to Quit use Esc and Colon

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Here are vi editor commands you can use to quit from Vi editor with or without saving your work. These are useful to use in day-to-day work.

w => To Save Your Work
q => To Quit
wq => To Save and Quit
q! => To quit without saving


vi editor also called Visual editor in terms of Unix or Linux or Ubuntu Operating systems. Since all are the same UNIX flavor, and UNIX is the mother of all these operating systems.


Recently many of my friends asked to share some daily use vi editor commands. I am sharing those for your quick reference.

6 Top vi Editor Commands


1. How to Edit a file?

vi filename

This is the first command to use for editing a file.


2. A command to Repeat Previous Command?

Use the UP arrow to repeat the previous command.


3. How to Insert data?

Use insert command to over-type data.


4. How to Save File?

Press Esc
then
:w

5. How to Save and Quit (Exit)?

Press Esc
then
:wq

6 How to quit without Save?

Press Esc
then
:q!

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