Day 8: Python Syntax: Basic Concepts — Deep Dive String manipulations

Admin June 20, 2025

String manipulation is an essential part of working with strings in Python. Below are some common string manipulations we can perform:

Table of Contents

String Formatting

We can format strings using f-strings (available in Python 3.6+), .format(), or the % operator.

name = "John"
age = 25
formatted_string = f"My name is {name} and I am {age} years old."  
# Output: "My name is John and I am 25 years old."

formatted_string2 = "My name is {} and I am {} years old.".format(name, age)  
# Output: "My name is John and I am 25 years old."

Checking String Case

(isupper(), islower())

my_string = "HELLO"
is_upper = my_string.isupper()  
# Output: True

my_string = "hello"
is_lower = my_string.islower()  
# Output: True

Joining a List of Strings

(join())

words = ["Hello", "World", "Python"]
joined_string = " ".join(words)  
# Output: "Hello World Python"

Testing for String Properties

(isalnum(), isalpha(), isdigit(), etc.)

my_string = "Hello123"
is_alnum = my_string.isalnum() 
 # Output: True (contains letters and digits)

alpha_string = "Hello"
is_alpha = alpha_string.isalpha()  
# Output: True (only letters)

digit_string = "12345"
is_digit = digit_string.isdigit()  
# Output: True (only digits)