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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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How to Write Python 'Hello World' Program Quickly and Run it

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The first Python program looks like the below.  I have explained the steps you need to write your first program in Python.
First Python Program

My first program: odbchelper.py

You can write your program as nameccheck.py module.

if authorsFirstName == 'Irv':
      teachingPython = True
      print 'Pay attention to his wisdom'

How to Run Your Python Program

python namecheck.py

Sample python program

if authorsFirstName == 'Irv':
     teachingPython = True
   print 'Pay attention to his wisdom'

The above if condition checks for first name. 

In python '==', means equal to. It makes true to teachingPython. 

You can start your python program quickly. Really useful for learning and to use it in projects.

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