Strings Introduction

Python tutorial · PySpark.in

String in Python

A string is a sequence of characters enclosed within single quotes (' ') or double quotes (" ").Strings can contain letters, digits, symbols, or spaces and are widely used for storing and processing text.

Example:

# Define strings
name = "Rohan"
greeting = 'Hello, World!'
# Print the strings
print(name)
print(greeting)

▶ Output will appear here.

Key Characteristics of Strings

Strings are Immutable

Immutable – You cannot change a string after it is created.

1text = "Hello"

2# text[0] = 'h' # This will give an error

▶ Output will appear here.

Ordered – Each character has a position called an index, starting from 0.

word = "Python"
print(word[0])  # Output: P
print(word[5])  # Output: n

▶ Output will appear here.

Iterable – You can loop through each character in a string.

1for ch in "Python":

2 print(ch)

▶ Output will appear here.

Creating Strings

Single-line strings: Strings defined in one line using single or double quotes.

1str1 = "Hello"

2str2 = 'Python'

▶ Output will appear here.

Multi-line strings (using triple quotes):Strings written across multiple lines using triple quotes (``` or """)

str3 = """This is
a multi-line
string."""

▶ Output will appear here.

Basic String Operations

Concatenation (joining strings):Joining two or more strings using the + operator.

str1 = "Hello"
str2 = "World"
result = str1 + " " + str2
print(result)  # Output: Hello World

▶ Output will appear here.

Repetition : Repeating a string multiple times using the * operator.

1print("Ha" * 3) # Output: HaHaHa

▶ Output will appear here.

Length of a string

The len() function returns the total number of characters in a string.

1name = "Megha"

2print(len(name)) # Output: 5

▶ Output will appear here.

Common String Methods

text = " python programming "
print(text.upper()) # " PYTHON PROGRAMMING "
print(text.lower()) # " python programming "
print(text.strip()) # "python programming" (removes spaces)
print(text.replace("python", "java"))  # " java programming "
print(text.split()) # ['python', 'programming']
print(text.startswith(" py"))  # True
print(text.endswith("ing ")) # True

▶ Output will appear here.

Why Strings are Important

Strings are used to store and manipulate textual data.
They are essential for tasks like user input, file handling, data processing, and web applications.

Strings Introduction

String in Python

Example:

Key Characteristics of Strings

Creating Strings

Basic String Operations

Common String Methods

Why Strings are Important

More Python tutorials