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Python Strings

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Strings in Python are used to store text. A string is a sequence of characters enclosed in single or double quotes.

🔹 Create a String

a = "Hello"
b = 'World'
print(a, b)

🔹 Multiline String

Use triple quotes for multiline strings.

text = """This is a
multiline string."""
print(text)

🔹 String Indexing

Each character in a string has an index. The first character has index 0.

a = "Python"
print(a[0])  # Output: P
print(a[1])  # Output: y

🔹 Loop Through a String

for letter in "Python":
    print(letter)

🔹 String Length

Use len() to get the number of characters in a string.

a = "Hello"
print(len(a))  # Output: 5

🔹 Check Substring

Use the in keyword to check if a word or letter is in the string.

text = "Python is fun"
print("fun" in text)  # Output: True

🔹 String Slicing

a = "Programming"
print(a[0:6])   # Output: Progra
print(a[:4])    # Output: Prog
print(a[4:])    # Output: ramming

🔹 String Methods

text = " Hello World "

print(text.lower())    # hello world
print(text.upper())    # HELLO WORLD
print(text.strip())    # Hello World
print(text.replace("World", "Python"))  # Hello Python
print(text.split())    # ['Hello', 'World']

🔹 String Concatenation

a = "Hello"
b = "Python"
c = a + " " + b
print(c)

🔹 Escape Characters

Use backslash \ to escape characters.

print("He said \"Hello\"")

🧪 Try It Yourself

Practice string slicing, concatenation, indexing, and built-in methods.

Practice Questions

Q1. Write a Python program to create a string and print its first and last characters.

Q2. Write a Python program to slice and print the word "Python" from the string "I love Python programming".

Q3. Write a Python program to use a loop to print each letter in the word "STRING".

Q4. Write a Python program to concatenate "Hello" and "World" with a space in between and print the result.

Q5. Write a Python program to replace "dog" with "cat" in the string "The dog is cute".

Q6. Write a Python program to split the sentence "Welcome to Python" into a list of words.

Q7. Write a Python program to check if the word "code" exists in the string "codepractice.in".

Q8. Write a Python program to convert the string "python programming" to uppercase.

Q9. Write a Python program to print the length of the string "Technovlogs".

Q10. Write a Python program to use an escape character to print: She said "Hi".

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Python

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Introduction to Python

Python Basics

Cotrol Structures

Data Structures

Date and Time

Functions and Module

File Handling

Python OOP

Advanced Concepts

Python DSA

Searching Algorithms

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