Comparison operators in Javascript - Mini Project: Build & Apply

Comparison Operators in JavaScript

📖 Scenario: You are creating a simple program to compare ages of two friends to see who is older or if they are the same age.

🎯 Goal: Build a JavaScript program that stores two ages, compares them using comparison operators, and prints the correct message about who is older or if they are the same age.

📋 What You'll Learn

Create two variables with exact names and values for ages

Create a variable to hold the age difference

Use comparison operators to check which age is greater or if they are equal

Print the correct message based on the comparison

💡 Why This Matters

🌍 Real World

Comparing values is common in apps like age verification, sorting lists, or decision making.

💼 Career

Understanding comparison operators and conditional logic is essential for any programming job.

1

Create age variables

Create two variables called ageAlice and ageBob with the exact values 25 and 30 respectively.

Javascript

// Create variables ageAlice and ageBob with values 25 and 30
// Your code here

Need a hint?

Use const to create variables and assign the numbers 25 and 30.

2

Calculate age difference

Create a variable called ageDifference that stores the result of ageBob - ageAlice.

Javascript

const ageAlice = 25;
const ageBob = 30;
// Create ageDifference as ageBob minus ageAlice
// Your code here

Need a hint?

Subtract ageAlice from ageBob and store it in ageDifference.

3

Compare ages using comparison operators

Use if, else if, and else statements with comparison operators >, <, and === to check if ageAlice is greater than, less than, or equal to ageBob. Inside each block, assign a message string to a variable called result describing who is older or if they are the same age.

Javascript

const ageAlice = 25;
const ageBob = 30;
const ageDifference = ageBob - ageAlice;
// Use if, else if, else with comparison operators to set result message
// Your code here

Need a hint?

Use if to check if Alice is older, else if to check if Bob is older, and else for when ages are equal.

4

Print the result

Write a console.log statement to print the value of the variable result.

Javascript

const ageAlice = 25;
const ageBob = 30;
const ageDifference = ageBob - ageAlice;
let result;
if (ageAlice > ageBob) {
    result = "Alice is older than Bob.";
} else if (ageAlice < ageBob) {
    result = "Bob is older than Alice.";
} else {
    result = "Alice and Bob are the same age.";
}
// Print the result variable
// Your code here

Need a hint?

Use console.log(result); to show the message in the console.