Practice: JS Fundamentals

Let's Think This Through for a Second

This practice set is designed to help you drill the variables, operators, if/else, loops, functions, and arrays/objects skills you learned in the JS Basics, Control Flow, and Core Concepts chapters until they feel second nature. You won't be learning anything new here — it's all about putting concepts you already know back into practice. Write the code for each task yourself and check the output with console.log. Writing out the syntax for each concept over and over until it sticks is a genuinely important practice method.

Exercises

Task 1: Store a celsius temperature in a `let` variable and write the Celsius-to-Fahrenheit conversion formula using operators. Task 2: Write a function that takes a number as a parameter, uses an if/else statement to check whether it's positive, negative, or zero, and returns a string. Task 3: Use a for loop to push only the even numbers from 1 to 20 into an array. Task 4: Build an array of student objects (name, score), then use forEach to console.log "Fail" for scores below 50 and "Pass" for scores of 50 and above.

• Have you written the Celsius-to-Fahrenheit converter function?
• Does the if/else classification function work?
• Is the loop and array filter logic correct?

Code Example

// Task 1: Temperature converter
function celsiusToFahrenheit(celsius) {
  // TODO: formula ရေးပါ - (celsius * 9/5) + 32
}

// Task 2: Number classifier
function classifyNumber(num) {
  // TODO: positive / negative / zero စစ်ပါ
}

// Task 3: Even numbers 1-20
const evenNumbers = [];
for (let i = 1; i <= 20; i++) {
  // TODO: even number ဆိုရင် push လုပ်ပါ
}

// Task 4: Pass/Fail checker
const students = [
  { name: "Aye", score: 72 },
  { name: "Bo", score: 45 },
  { name: "Cho", score: 88 }
];
students.forEach((student) => {
  // TODO: score 50 အောက်ရင် Fail, အထက်ရင် Pass ပြပါ
});

The console will show the Fahrenheit value, the classification string, the even numbers array [2,4,6,...,20], and a Pass/Fail status for each student in the list.