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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 Use For loop List Option Quickly

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For loop is main concept in Python programming. Out of all the For Loop options, the list option is so popular. If you know, how to use this concept, you can write any number of programs quickly and with less effort.

Using for loop you can get index for list items. You can print list elements using for loop.

If you take any language, the loops play a vital role.
for loop using list in python

How to Use For Loop

When you want to deal with data of multiple values, you need loops. So, For Loop is so famous because, you can control multiple input values.

Syntax to Write For Loop

       
for i in my_list:
    print(i)

The 'i' says variable that represents value in the 'my_list'. The for helps to iterate the list values one by one.

Example Program For Loop List in Python 

           my_list=[2,3,4]
           for i in my_list:
                print(i)

Result 

           2
           3
           4

How to create Multiplication Table using Python For-Loop List Option.

Function to create table
Function to create table

Result of function that generated Multiplication Table 

 
how to create table in python
Creating multiplication table in python

Bottom Line

  1. You can use for loop to calculate Factorial and listing values one by one.
  2. Your input data contains multiple values, then For loop is so useful.

References

  1. SanFoundary for Python Sample Programs

Top Courses

Top Books
  1. Taming Python by Programming

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