FizzBuzz

function FizzBuzz(n) {
    let result = [];
    
    for (let i = 1; i <= n; i++) {
        let str = '';
        
        if (i % 3 === 0) {
            str = str + "Fizz";
        }
        
        if (i % 5 === 0) {
            str = str + "Buzz";
        }
        
        if (str.length === 0) {
            result.push(i);
        } else {
            result.push(str);
        }
    }
    
    return result.join('\n');
}

console.log(FizzBuzz(10));