1 Python Arrays
1. What is an Array?
An array is a collection of multiple values stored in one variable.
In simple words:
👉 Instead of creating many variables
👉 We store many values together
Example:
2. Arrays in Python (Important)
Python does not have a built-in array type like some other languages.
👉 In Python, we mostly use:
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Lists as arrays
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Sometimes the array module (advanced)
For beginners, list = array ✅
3. Create an Array (Using List)
Example
4. Access Array Elements
Use index number (starts from 0).
Example
5. Change Array Element
Example
6. Array Length
Example
7. Loop Through an Array
Example
8. Add Items to Array
Add One Item
Add Many Items
9. Remove Items from Array
Remove by Value
Remove by Index
10. Array with Different Data Types
Example
11. Array Using array Module (Optional)
This is less common, but Python supports it.
Example
👉 'i' means integer type.
12. When to Use List vs Array Module?
| List | array module |
|---|---|
| Easy | Slightly advanced |
| Can store any type | Same type only |
| Most common | Less common |
👉 Beginners should use lists.
13. Common Beginner Mistakes
❌ Using Index Out of Range
❌ Error.
❌ Forgetting Index Starts from 0
14. Simple Practice Examples
Example 1: Sum of Array
Example 2: Find Largest Number
Example 3: Even Numbers
15. Summary (Python Arrays)
✔ Array stores multiple values
✔ In Python, lists are used as arrays
✔ Index starts from 0
✔ Can add, remove, change values
✔ Very useful in programs
📘 Perfect for Beginner eBook
This chapter is ideal for:
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Python beginner books
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School & college students
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Self-learners
If you want next, I can write:
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Array Methods
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Array Exercises
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NumPy Arrays (easy)
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Real-Life Array Programs
Just tell me 😊
