Unary operators in Javascript - Mini Project: Build & Apply

Unary Operators in JavaScript

📖 Scenario: You are working on a simple calculator app that needs to handle increasing and decreasing numbers by one. This is common in counters, like counting items in a shopping cart or tracking steps in a game.

🎯 Goal: Build a small program that uses unary operators to increase and decrease a number by one.

📋 What You'll Learn

Create a variable with an initial number

Create a variable to hold the incremented number using the increment operator ++

Create a variable to hold the decremented number using the decrement operator --

Print the original, incremented, and decremented numbers

💡 Why This Matters

🌍 Real World

Counters are everywhere: counting clicks, items in a cart, or steps in a game. Unary operators make these tasks simple and fast.

💼 Career

Understanding unary operators is essential for writing clean and efficient code in many programming jobs, especially in frontend and backend development.

1

Create the initial number variable

Create a variable called count and set it to the number 10.

Javascript

# Your code here

Need a hint?

Use let to create a variable named count and assign it the value 10.

2

Create incremented number using increment operator

Create a variable called incremented and set it to count plus one using the increment operator ++.

Javascript

let count = 10;
# Your code here

Need a hint?

Use the prefix increment operator ++count to add one to count and assign it to incremented.

3

Create decremented number using decrement operator

Create a variable called decremented and set it to incremented minus one using the decrement operator --.

Javascript

let count = 10;
let incremented = ++count;
# Your code here

Need a hint?

Use the prefix decrement operator --incremented to subtract one from incremented and assign it to decremented.

4

Print all three numbers

Use console.log to print the values of count, incremented, and decremented each on a new line.

Javascript

let count = 10;
let incremented = ++count;
let decremented = --incremented;
# Your code here

Need a hint?

Use three console.log statements to print each variable on its own line.