Else–if ladder in Javascript - Mini Project: Build & Apply

Else-if ladder

📖 Scenario: You are creating a simple program that gives a message based on the temperature outside. This helps people decide what to wear.

🎯 Goal: Build a program that uses an else if ladder to check the temperature and print the right message.

📋 What You'll Learn

Create a variable called temperature with a number value.

Create a variable called message to store the result message.

Use an else if ladder to set message based on temperature:

temperature >= 30 -> message is "It's very hot outside."

temperature >= 20 -> message is "The weather is warm."

temperature >= 10 -> message is "It's a bit chilly."

Otherwise, message is "It's cold outside."

Print the message.

💡 Why This Matters

🌍 Real World

Checking temperature and giving advice is common in weather apps and smart home devices.

💼 Career

Understanding conditional logic like else if ladders is essential for programming decisions in many software projects.

1

Create the temperature variable

Create a variable called temperature and set it to the number 25.

Javascript

// Your code here

Need a hint?

Use let temperature = 25; to create the variable.

2

Create the message variable

Create a variable called message and set it to an empty string "".

Javascript

let temperature = 25;
// Your code here

Need a hint?

Use let message = ""; to create the variable.

3

Use else if ladder to set the message

Use an if statement with an else if ladder to set message based on temperature as follows:
- If temperature >= 30, set message = "It's very hot outside."
- Else if temperature >= 20, set message = "The weather is warm."
- Else if temperature >= 10, set message = "It's a bit chilly."
- Else, set message = "It's cold outside."

Javascript

let temperature = 25;
let message = "";
// Your code here

Need a hint?

Use if, else if, and else to check the temperature ranges and set the message.

4

Print the message

Write console.log(message); to print the message to the console.

Javascript

let temperature = 25;
let message = "";

if (temperature >= 30) {
    message = "It's very hot outside.";
} else if (temperature >= 20) {
    message = "The weather is warm.";
} else if (temperature >= 10) {
    message = "It's a bit chilly.";
} else {
    message = "It's cold outside.";
}
// Your code here

Need a hint?

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