Fibonacci Sequence Generator

fibonacciSeq.js

//this is a function that generates a fibonacci sequence from any given number.
/*
  A Fibonacci sequence works with adding the last number to the first number to generate the next number. the first numbers is always
    0, 1 but sometimes, you might be asked to start from 1. Therefore, if you start from 0, 1, the next number will be 0 + 1 = 1
    that gives you 0, 1, 1 as the sequence.
*/

function fibonacciSeq(n) {
    var result = []; //an empty array for output
    if (n === 1) {
        result = [0]; //this is a template that says, if the input number into the function is 1, then return 0 as the output
    } else if (n === 2) {
        result = [0, 1]; //therefore, if 2 is passed as the parameter to the function, then return 0, 1
    } else {
        result = [0, 1]

        for (var x = 2; x < n; x++){
            result.push(result[result.length - 2] + result[result.length - 1]) // this loop now takes any given number, add the last number in the array to the number before the last number
        }
    }
    
    return result;
}

result = fibonacciSeq(5) //this is a test number, to generate a Fibonacci sequence for 5
console.log(result)