JavaScript 1 Practice

Use it. Then build it.

Start with small changes, then gradually do more yourself. If you get stuck, use the toolbox or open a hint. The goal is not memorising everything at once.

Beginner? Start at Challenge 1. The support slowly disappears as you get stronger.

Experienced? Try the Quick Check. If it is easy, jump to the Mastery Challenge and Bonus Lab.

Toolbox

JavaScript 1 Patterns

Here is one complete program so you can see how the pieces fit. Need one skill while practising? Copy just that pattern.

Complete example See how the pieces fit

<script>

let answer = prompt("What is 2 + 2?");

if (answer == 4) {
    alert("Correct!");
} else {
    alert("Try again!");
}

</script>

How to use this Not an answer sheet

Try the exercise first. If you forget the shape of a command, copy only the pattern you need and adapt it to your problem.

VARIABLE

let name = "Daniel";

PROMPT

let answer = prompt("Question?");

ALERT

alert("Hello!");

JOIN

alert("Hello " + name + "!");

MATHS

let area = length * width;

IF / ELSE

if (answer == 4) { alert("Correct!"); } else { alert("Try again!"); }

Experienced? Start Here

Quick Skill Check

Try these without the toolbox. If all four are easy, skip ahead.

1. GreetingAsk a name and alert Welcome NAME!.

2. MathsStore 8 and 6, multiply them, alert the answer.

3. DecisionAsk What is 4 + 5? and respond Correct / Wrong.

4. ComparisonAsk for a score. Unlock at 100 or more.

Your code

ResultNothing runs until RUN

Core Practice

Gradually take off the training wheels

The early exercises give you more help. Later ones make you remember and combine the same skills yourself.

Challenge 1 · Modify

Personal Welcome

Lots of support

The program already works. Make it yours.

Goal

Ask name→Welcome NAME to Dino Run!

Starter code

ResultChange the final message

Change only the final alert so it says something like Welcome Daniel to Dino Run!

Challenge 2 · Complete

Finish the Greeting Machine

Still guided

Now one important line is incomplete.

Starter code

GoalUse the variable

Hint

What variable did you store the player's name in?

Challenge 3 · Build from comments

Game Profile

Medium support

The comments tell you what each line should do. You write the JavaScript.

Target behavior

Ask name→Ask favourite game→Show both in one alert

Your code

ResultExample: Daniel likes Minecraft

Need a nudge?

You need two prompt() lines and one alert().

Challenge 4 · Maths

Area Calculator

Medium support

Most of the structure is there. You decide the calculation.

Starter code

Result5 × 4 should give 20

Challenge 5 · Comparison Symbols

Fill in the missing symbol

Quick logic check

Choose the symbol that matches each rule. No full program yet.

Choose from: == != < <= > >=

score ___ 100The level unlocks at 100 or more.

lives ___ 0Continue if lives are not equal to 0.

age ___ 10Only players younger than 10.

Check answers

score >= 100

lives != 0

age < 10

Challenge 6 · Complete if / else

Unlock the Level

Less support

Starter code

Rule100 or more unlocks it

Challenge 7 · Debug

Repair the Broken Quiz

Read code carefully

This is not about memory. It is about spotting what looks wrong.

Broken code

GoalMake the quiz run

What kind of mistakes?

Look for quotes and brackets. Also compare the if line with the toolbox.

Challenge 8 · Build from requirements

Secret Word

Almost independent

Your program must:

ask for a secret word
store the answer
use if / else
say ACCESS GRANTED if correct
say ACCESS DENIED otherwise

Your code

ResultYou choose the password

Need the structure?

let answer = prompt(...)

Then use if (...) { } else { }.

JS 1 MASTERY

Build a Guessing Game

Now put the main JavaScript 1 skills together with very little help.

Requirements

choose a secret number
ask the player to guess
store the guess
use if / else
alert a correct or wrong message

Your game

ResultCan someone else play it?

Hint 1

You need prompt, a variable and if / else.

Hint 2

let guess = prompt(...);

if (guess == ...) {

} else {

}

Bonus Lab · Experienced Coders

Same skills, more interesting combinations

These do not require new JavaScript. They require more planning.

Bonus A

Two-question quiz

Ask two questions and check each answer separately.

Bonus B

Mission admission

Ask the player's name and score, then decide whether the mission unlocks.

Bonus C

Choose a route

Make a tiny branching story using prompt, variables, if/else and alert.

Bonus A · Build

Two-question Quiz

Ask two questions. Check each one with its own if / else. Make the questions your own.

Your code

ResultNo starter code

Bonus B · Logic

Mission Admission

Target behavior

Ask name→Ask score→100+ accepted→under 100 train more

Your code

ResultUse both variables

Bonus C · Creative

Choose a Route

Ask the player to choose something such as forest or mountain. Give a different outcome for each choice.

Your code

ResultYour mini story

JavaScript 1 complete

If you can build the guessing game without copying a full solution, you are ready for JavaScript 2 and controlling actual HTML elements.