Project Euler #2, Fibonacci, javascript attemp

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I was attempting to do some problems on project euler. For the second one I did get the correct answer but I cheated a bit.

Heres the problem:

Each new term in the Fibonacci sequence is generated by adding the previous two terms. By starting with 1 and 2, the first 10 terms will be:

1, 2, 3, 5, 8, 13, 21, 34, 55, 89, ...

By considering the terms in the Fibonacci sequence whose values do not exceed four million, find the sum of the even-valued terms.

Heres my code:

var fib = [1,2];
var i = 0;
var sum = 0;
while (fib[0] + fib[1] < 4000000){
    i = fib[0] + fib[1];
    console.log(i); //just to show myself the number came out correctly.
    fib[0] = fib[1];
    fib[1] = i;

    if (i % 2 === 0){
        sum += i;
    }
}
console.log(sum + 2);

I added sum by 2 because I can't figure a way for the code to add the initial fib[1], which is a even number itself. Thanks.


If you start with [1, 2], the first fibonacci number that you get is 3.

In your loop you have:

i = 1+2 = 3
i = 2+3 = 5

So simply start with [0, 1]:

i = 0+1 = 1
i = 1+1 = 2
i = 1+2 = 3

Fixed code:

var fib = [0,1];
var i = 0;
var sum = 0;
while (fib[0]+fib[1] < 4000000){
    i= fib[0]+fib[1];
    fib[0]=fib[1];
    fib[1]=i;

        if(i%2 === 0){
        sum += i;
    }
}
console.log(sum);

Project Euler Problem 2 Solved with Javascript, Welcome to Round Two of Project Euler! This time It's stated in the problem, however, let's discuss what a Fibonacci sequence is a little bit and why it's important. The next I'm not going to sit here and try and explain someone else's code. Project Euler version. Each new term in the Fibonacci sequence is generated by adding the previous two terms. By starting with 1 and 2, the first 10 terms will be: By considering the terms in the Fibonacci sequence whose values do not exceed four million, find the sum of the even-valued terms.


Simple solution

var sum = 0;
var term1 = 1;
var term2 = 1;

while (term2 < 4000000) {
    term2 = term1 + term2;
    term1 = term2 - term1;
    sum += term2 % 2 === 0 ? term2 : 0;
}
console.log(sum);

JavaScript solution to Project Euler Problem 2, Each new term in the Fibonacci sequence is generated by adding the previous two terms. By starting with 1 and 2, the first 10 terms will be: 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, … By considering the terms in the Fibonacci sequence whose values do not exceed four million, find the sum of the even-valued terms. Each new term in the Fibonacci sequence is generated by adding the previous two terms. By starting with 1 and 2, the first 10 terms will be: 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, By considering


for (var sum = 0, i = 0, j = 0, k = 1; 4e6 > j + k; i++) i = j + k, j = k, k = i, sum += 0 == i % 2 ? i : 0;

It could help you.

Project Euler #2 [JavaScript], available right now. Please try again later. Published on Aug 1, 2015. Today we complete Duration: 6:47 Posted: Aug 1, 2015 I was attempting to do some problems on project euler. For the second one I did get the correct answer but I cheated a bit. Heres the problem: Each new term in the Fibonacci sequence is generated by adding the previous two terms. By starting with 1 and 2, the first 10 terms will be: 1, 2, 3, 5, 8, 13, 21, 34, 55, 89,


let num1 = 0; 
let num2 = 1;
let total = 0;
let num3 = 0;
let i = 0;
while(num1 + num2 < 4000000){
     num3 = num1 + num2;
     num1 = num2; //as loop keep going is changes the position of number
     num2 = num3; //as loop keep going is changes the position of number
     if(num3 % 2 === 0 ){ // check weather number is even or not 
        total += num3;    //every even number gets added
        }
     i++
}
console.log(total);

Project Euler: Problem 2: Even Fibonacci Numbers, hello every body I am in the problem N.2 of Project Euler challenges and that's my solution Project Euler: Problem 2: Even Fibonacci Numbers assumptions about the implementation on freeCodeCamp without having attempted it—but now Powered by Discourse, best viewed with JavaScript enabled. Project Euler #2: Even Fibonacci numbers. Lets the fibonacci series:1 1 2 3 5 8 13 21 34 55 89 144. I am using javascript. Not running out of time. but case


This is my code for the same problem. It is not perfect but I hope this will help someone who reads this.

function fibonacci(stop) {
  var a = 1, b = 0, c, storage = []
  for (var i = 0; a < stop; i++) {
    c = a
    a = a + b
    b = c
    if (b%2 == 0) {
      let even = b
      storage.unshift(even)
    }
  }
  var all = storage.reduce((x, y) => {return x + y}, 0)
  console.log(all)
}

fibonacci(4000000); // 4613732

Project Euler / Tom MacWright / Observable, Project Euler By Deutsche Post der DDR (scan du timbre) [Public domain], via Solving Euler questions 1, 2, 3, 4, 5, 13, 16, 20, 22, 48, 59 Using bignumber.js for By considering the terms in the Fibonacci sequence whose values do not The text file, keylog.txt, contains fifty successful login attempts. Each new term in the Fibonacci sequence is generated by adding the previous two terms. By starting with 1 and 2, the first 10 terms will be: 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, By considering the terms in the Fibonacci sequence whose values do not exceed four million, find the sum of the even-valued terms.


projecteuler.net Problem 2: Fibonacci sum. A JavaScript solution , fibonacci.js. /*. projecteuler.net. Problem 2. Each new term in the Fibonacci sequence is generated by adding the previous two terms. By starting with 1 and 2​,  This problem is a programming version of Problem 2 from projecteuler.net. Each new term in the Fibonacci sequence is generated by adding the previous two terms. By starting with and , the first terms will be:


Project Euler #2: Even Fibonacci numbers Discussions |, If you try locally to print all the even numbers generated by your code you will notice that at some point (precisely around 79th fibonacci number), js does some​  Blank Editor is a show for new programmers who have trouble applying the programming concepts they've learned into real programs. This episode solves problem 2 from the Project Euler site: https


Even Fibonacci numbers, The Even Fibonacci numbers problem proposed by Project Euler. Each new term in the Fibonacci sequence is generated by adding the previous two terms. problem a little object orientated as it's something I'm really trying to get to grips with. I started this blog to share my passion for JavaScript and UX. I'm a novice at programming and I've been trying Project Euler to learn more about R. The question that's stumping me is as follows: Each new term in the Fibonacci sequence is generated by adding the previous two terms. By starting with 1 and 2, the first 10 terms will be: 1, 2, 3, 5, 8, 13, 21, 34, 55, 89