Day 4: Nested Loops & Classic Algorithms (FizzBuzz)

Daily Objective

Master nested iteration and implement classic logic patterns like multiplication grids and FizzBuzz.

1. Nested Loops (Multiplication Table)

for (let table = 1; table <= 3; table++) {
  console.log(`--- Table of ${table} ---`);
  for (let num = 1; num <= 5; num++) {
    console.log(`${table} x ${num} = ${table * num}`);
  }
}

2. The Classic FizzBuzz Algorithm

Print numbers 1 to 100:

• Multiples of 3: Print “Fizz”
• Multiples of 5: Print “Buzz”
• Multiples of both 3 and 5: Print “FizzBuzz”
• Otherwise: Print the number

for (let i = 1; i <= 15; 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);
  }
}

Daily Hands-on Practice (70%)

1. Write the full FizzBuzz challenge from 1 to 50 from memory.
2. Build a checkerboard pattern in console using nested loops.