01 Language foundations: challenges

Use the script src and defer starter. Read the browser console, not the terminal.

console.log("Welcome to my project");
console.log(6 * 7);

The heading appears on the page; both logged values appear in that tab’s Console.

Quotes create literal text.

const clubName = "Robotics";
console.log(clubName);
console.log("clubName");

Only the score needs reassignment.

const bonus = 5;
let score = 10;
score += bonus;
score += bonus;
console.log(score);

Read the right-hand side before assigning.

let balance = 20;
balance = balance + 8;
balance = balance - 5;
console.log(balance);

balance = 8 replaces the old balance; it does not preserve and increase it.

Convert the known text deliberately.

const countText = "4";
const count = Number(countText);
const total = count * 6;
console.log(total);
console.log(typeof total);

For real form input, also reject blank or invalid values. Number alone is not complete validation.

Use backticks and ${...}.

const name = "Alex";
const rounds = 3;
const pointsPerRound = 4;
console.log(`${name} earned ${rounds * pointsPerRound} points in ${rounds} rounds.`);

At least includes equality.

const score = 10;
if (score >= 10) {
  console.log("Target reached");
} else {
  console.log("Keep going");
}

Expected for 9: Keep going. Expected for 10 and 11: Target reached. Change the constant between runs.

Two required conditions need &&.

const age = 12;
const hasPermission = true;
if (age >= 12 && hasPermission) {
  console.log("Approved");
} else {
  console.log("Not approved");
}

Only age 12 with permission true is approved among these four cases. A string "false" is not the boolean false.

Write down the first value, last permitted value and update.

for (let round = 1; round <= 5; round++) {
  console.log(`Round ${round}`);
}

Keep the total outside the repeated body.

let total = 0;
for (let number = 1; number <= 5; number++) {
  total = total + number;
}
console.log(total);

Initialise once before the loop. Resetting inside would erase earlier additions.

Ensure the update moves towards a false condition.

let count = 4;
while (count > 0) {
  console.log(count);
  count--;
}
console.log("Launch!");

With count initially 0, the body runs zero times and only Launch! is logged. Do not remove the update and run an infinite loop.

Keep the total outside the loop. Put the bonus decision inside; put the final target decision after the loop.

const playerName = "Alex";
const rounds = 4;
const pointsPerRound = 3;
const bonusAtRound = 3;
const bonusPoints = 2;
const target = 14;
let total = 0;

for (let round = 1; round <= rounds; round++) {
  total += pointsPerRound;
  if (round === bonusAtRound) {
    total += bonusPoints;
  }
  console.log(`Round ${round}: ${total} points`);
}

if (total >= target) {
  console.log(`${playerName} reached the target with ${total} points.`);
} else {
  console.log(`${playerName} needs ${target - total} more points.`);
}

With target 15, the round totals stay 3, 6, 11 and 14, but the final message is Alex needs 1 more points. A stretch task is to improve singular/plural wording using another condition.