This JavaScript code implements the FizzBuzz challenge, which prints "Fizz" for multiples of 3, "Buzz" for multiples of 5, "FizzBuzz" for multiples of both, and the number itself otherwise, from 1 to 100.

Run example

npm run import -- "http://wiki.c2.com/FizzBuzzTest"

http://wiki.c2.com/FizzBuzzTest

function fizzBuzz() {
    for(var i = 1; i <= 100; i++) {
        var buffer = '';
        if(i % 3 === 0)
            buffer += 'Fizz';
        if(i % 5 === 0)
            buffer += 'Buzz';
        if(buffer.length === 0)
            buffer += i;
        console.log(buffer);
    }
}

fizzBuzz();

/**
 * Prints the FizzBuzz sequence up to 100.
 * 
 * The FizzBuzz sequence is a series of numbers where each number is replaced by:
 * - "Fizz" if it's a multiple of 3
 * - "Buzz" if it's a multiple of 5
 * - The number itself if it's not a multiple of either 3 or 5
 */
function fizzBuzz() {
    // Use a more efficient approach by directly generating the output string
    for (let i = 1; i <= 100; i++) {
        const output = getFizzBuzzString(i);
        console.log(output);
    }
}

/**
 * Returns the FizzBuzz string for a given number.
 * 
 * @param {number} num The number to generate the FizzBuzz string for
 * @returns {string} The FizzBuzz string for the given number
 */
function getFizzBuzzString(num) {
    // Use a more efficient approach by checking the conditions only once
    let output = '';
    if (num % 3 === 0) output += 'Fizz'; // Check for Fizz first to avoid adding extra strings
    if (num % 5 === 0) output += 'Buzz';
    if (output === '') output = num.toString(); // Use toString() for consistency
    return output;
}

fizzBuzz();

This JavaScript code implements the classic "FizzBuzz" programming challenge.

Here's a breakdown:

1. function fizzBuzz() { ... }: Defines a function named fizzBuzz that encapsulates the logic.

2. for (var i = 1; i <= 100; i++) { ... }: A for loop iterates from 1 to 100 (inclusive). In each iteration, the variable i represents the current number.

3. var buffer = '';: Initializes an empty string called buffer to store the output for each number.

4. if (i % 3 === 0) buffer += 'Fizz';: Checks if i is divisible by 3. If so, it appends "Fizz" to the buffer.

5. if (i % 5 === 0) buffer += 'Buzz';: Checks if i is divisible by 5. If so, it appends "Buzz" to the buffer.

6. if (buffer.length === 0) buffer += i;: If neither "Fizz" nor "Buzz" was added, it means the number is not divisible by 3 or 5, so it appends the number i itself to the buffer.

7. console.log(buffer);: Prints the contents of the buffer (which will be "Fizz", "Buzz", "FizzBuzz", or the number itself) to the console.

8. fizzBuzz();: Calls the fizzBuzz function to execute the code.

Let me know if you'd like any further clarification!