What is String Manipulation?
String manipulation is the art of modifying, slicing, and playing around with text in Python. Think of it as using a magic wand to transform words into whatever you need!
Why Manipulate Strings?
- Clean and format text
- Extract useful information
- Make code more efficient and readable
Creating and Accessing Strings
Strings in Python are written inside quotes ("" or '').
text = "Hello, Python!"
print(text) # Outputs: Hello, Python!
Accessing Characters
Use indexing to get specific characters.
print(text[0]) # Outputs: H
print(text[-1]) # Outputs: !
String Slicing
Want only a part of a string? Use slicing!
print(text[0:5]) # Outputs: Hello
print(text[:6]) # Outputs: Hello,
print(text[7:]) # Outputs: Python!
Modifying Strings
Strings are immutable, but we can create new modified versions.
Convert to Uppercase/Lowercase
print(text.upper()) # Outputs: HELLO, PYTHON!
print(text.lower()) # Outputs: hello, python!
Remove Whitespace
text = " Python Magic "
print(text.strip()) # Outputs: Python Magic
Replace Text
print(text.replace("Python", "Code")) # Outputs: Code Magic
String Concatenation and Formatting
Combining Strings ➕
greeting = "Hello"
name = "Alice"
message = greeting + ", " + name + "!"
print(message) # Outputs: Hello, Alice!
Using f-strings
age = 25
print(f"{name} is {age} years old.") # Outputs: Alice is 25 years old.
Finding and Checking Strings
Check if a word exists
print("Python" in text) # Outputs: True
Find Position of a Substring
print(text.find("Magic")) # Outputs: 7
Summary
| Concept | Description |
|---|---|
| String | Sequence of characters inside quotes |
| Indexing | Access individual characters using indexes |
| Slicing | Extract part of a string using [start:end] |
| Methods | .upper(), .lower(), .strip(), .replace() |
| Concatenation | Combine strings using + or f-strings |
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