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Rediscovering JavaScript: ES6, ES7 & ES8

Solution Review: Fibonacci Series

Explore how to create a generator function in JavaScript to produce Fibonacci numbers. Understand managing sequence state with variables, using yield to produce values, and controlling iteration with a loop and break condition to efficiently generate the series.

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Solution

The solution to the “Fibonacci series” challenge is given below.

Node.js
const fibonocciSeries = function*(n) {
  let current = 0;
  let next = 1;
  yield* [current, next];
  while(true) {
    const temp = current;
    current = next;
    next = next + temp;
    if(next > n) break;
    yield next;
  
  }
}
for(const value of fibonocciSeries(25)) {
  console.log(value);
}

Explanation

We need to implement a generator function that will yield the Fibonacci numbers.

  • In the Fibonacci series, every subsequent number is the sum of two previous numbers. So, first, we need to set two starting points, which are
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