Student Activity

Student Activity (30-min)

Solve JavaScript Puzzles (15 min):

1. Problem 1: FizzBuzz

   • Write a loop that prints:

     • "Fizz" for multiples of 3.

     • "Buzz" for multiples of 5.

     • "FizzBuzz" for multiples of both.

   • Solution Example:

     javascript코드 복사for (let i = 1; i <= 20; i++) {
       if (i % 3 === 0 && i % 5 === 0) {
         console.log('FizzBuzz');
       } else if (i % 3 === 0) {
         console.log('Fizz');
       } else if (i % 5 === 0) {
         console.log('Buzz');
       } else {
         console.log(i);
       }
     }

2. Problem 2: Sum of Array

   • Calculate the sum of numbers in an array [10, 20, 30, 40] using a loop.

   • Solution Example:

     javascript코드 복사const arr = [10, 20, 30, 40];
     let sum = 0;
     for (let num of arr) {
       sum += num;
     }
     console.log('Sum:', sum);

Debug JavaScript Code Snippets (15 min):

1. Problem 1: Fix the Code

   javascript코드 복사const x = 10;
   if (x = 5) { // Error: Assignment instead of comparison
     console.log('Equal to 5');
   }

   • Fix:

     javascript코드 복사const x = 10;
     if (x === 5) {
       console.log('Equal to 5');
     }

   코드 복사

2. Problem 2: Correct the Loop

   javascript코드 복사let nums = [1, 2, 3, 4];
   nums.forEach(i => {
     if (i % 2 === 0) {
       nums.pop(); // Error: Modifying array during iteration
     }
   });

   • Fix:

     javascript코드 복사let nums = [1, 2, 3, 4];
     nums = nums.filter(i => i % 2 !== 0);
     console.log(nums);