String Basics and Memory Representation in DSA Python - Build from Scratch

String Basics and Memory Representation

📖 Scenario: Imagine you are working with a simple text message system. You want to understand how strings are stored and how to access their parts.

🎯 Goal: You will create a string variable, find its length, access specific characters, and print the results to see how strings work in memory.

📋 What You'll Learn

Create a string variable with exact content

Create a variable to store the length of the string

Access specific characters by index

Print the string, its length, and accessed characters

💡 Why This Matters

🌍 Real World

Understanding strings and their memory representation helps when working with text data in messaging apps, file processing, and user input handling.

💼 Career

Basic string manipulation is essential for software developers, data analysts, and anyone working with text processing or user interfaces.

1

Create the string variable

Create a string variable called message and assign it the exact value "Hello, World!"

DSA Python

# Create the string variable 'message' with value "Hello, World!"
# Your code here

Hint

Use double quotes around the text exactly as shown.

2

Find the length of the string

Create a variable called length and set it to the length of the string message using the len() function

DSA Python

message = "Hello, World!"
# Create variable 'length' to store length of 'message'
# Your code here

Hint

Use len(message) to get the number of characters.

3

Access specific characters by index

Create two variables: first_char to store the first character of message and last_char to store the last character of message using indexing

DSA Python

message = "Hello, World!"
length = len(message)
# Create 'first_char' as message[0]
# Create 'last_char' as message[length - 1]
# Your code here

Hint

Remember, string indexes start at 0.

4

Print the string, its length, and accessed characters

Print the variables message, length, first_char, and last_char each on a separate line

DSA Python

message = "Hello, World!"
length = len(message)
first_char = message[0]
last_char = message[length - 1]
# Print 'message', 'length', 'first_char', and 'last_char'
# Your code here

Hint

Use separate print() statements for each variable.