Variable declaration using const in Javascript - Mini Project: Build & Apply

Variable Declaration Using const

📖 Scenario: You are creating a simple program to store information about a favorite fruit. You want to make sure the fruit name does not change accidentally.

🎯 Goal: Learn how to declare a variable using const in JavaScript and understand that its value cannot be changed later.

📋 What You'll Learn

Declare a variable using const

Assign a string value to the const variable

Try to change the value (to see what happens, but this will be commented out)

Print the value of the const variable

💡 Why This Matters

🌍 Real World

Using <code>const</code> helps keep important values safe from accidental changes in programs, like fixed settings or names.

💼 Career

Understanding <code>const</code> is essential for writing reliable JavaScript code in web development and many programming jobs.

1

Declare a const variable

Declare a variable called favoriteFruit using const and assign it the value "Apple".

Javascript

# Declare a const variable called favoriteFruit and assign it "Apple"
// Your code here

Need a hint?

Use const favoriteFruit = "Apple"; to declare the variable.

2

Add a comment about changing the variable

Add a comment below the declaration explaining that favoriteFruit cannot be changed because it is declared with const.

Javascript

const favoriteFruit = "Apple";
// Add a comment explaining favoriteFruit cannot be changed
// Your code here

Need a hint?

Write a comment starting with // explaining the variable is constant.

3

Try to change the const variable (commented out)

Add a line below the comment that tries to change favoriteFruit to "Banana", but comment it out so the program does not break.

Javascript

const favoriteFruit = "Apple";
// favoriteFruit cannot be changed because it is declared with const
// Try to change favoriteFruit to "Banana" but comment it out
// Your code here

Need a hint?

Write // favoriteFruit = "Banana"; to show the change attempt is commented out.

4

Print the value of the const variable

Write a line to print the value of favoriteFruit using console.log.

Javascript

const favoriteFruit = "Apple";
// favoriteFruit cannot be changed because it is declared with const
// favoriteFruit = "Banana"; // This will cause an error if uncommented
// Print favoriteFruit
// Your code here

Need a hint?

Use console.log(favoriteFruit); to print the value.