Array Access and Update at Index in DSA Python - Build from Scratch

Array Access and Update at Index

📖 Scenario: You are managing a list of daily temperatures recorded in a week. Sometimes, you need to check the temperature of a specific day or update it if there was a mistake in recording.

🎯 Goal: Build a simple program that creates a list of temperatures, sets a specific day index to a new temperature, and then prints the updated list.

📋 What You'll Learn

Create a list called temperatures with exactly these values: 23, 25, 22, 20, 24, 26, 21

Create a variable called day_index and set it to 3

Update the temperature at index day_index in temperatures to 19

Print the temperatures list after the update

💡 Why This Matters

🌍 Real World

Lists are used to store collections of data like daily temperatures, sales numbers, or scores. Being able to access and update specific items helps keep data accurate.

💼 Career

Many programming jobs require working with lists or arrays to manage data. Knowing how to access and change elements by index is a fundamental skill.

1

Create the temperatures list

Create a list called temperatures with these exact values in order: 23, 25, 22, 20, 24, 26, 21

DSA Python

# Create the temperatures list with the given values
# Your code here

Hint

Use square brackets [] to create a list and separate values with commas.

2

Set the day index

Create a variable called day_index and set it to the integer 3

DSA Python

temperatures = [23, 25, 22, 20, 24, 26, 21]
# Create the day_index variable and set it to 3
# Your code here

Hint

Use the assignment operator = to set day_index to 3.

3

Update the temperature at the given index

Update the value in the temperatures list at index day_index to 19

DSA Python

temperatures = [23, 25, 22, 20, 24, 26, 21]
day_index = 3
# Update the temperature at index day_index to 19
# Your code here

Hint

Use square brackets with the index variable to access and update the list element.

4

Print the updated temperatures list

Print the temperatures list to show the updated values

DSA Python

temperatures = [23, 25, 22, 20, 24, 26, 21]
day_index = 3
temperatures[day_index] = 19
# Print the temperatures list
# Your code here

Hint

Use the print() function to display the list.