node js fibonacci series

To generate the Fibonacci series using Node.js, follow these steps:

1. Define a function called fibonacci that takes a parameter called n to represent the number of terms in the series.
2. Inside the fibonacci function, create an array called fibArray to store the Fibonacci series.
3. Check if the value of n is less than or equal to 0. If it is, return an empty array, as there are no terms to generate.
4. Check if the value of n is equal to 1. If it is, return an array containing the number 0, as the Fibonacci series starts with 0.
5. Check if the value of n is equal to 2. If it is, return an array containing the numbers 0 and 1, as the first two terms of the series.
6. If none of the above conditions are met, initialize the fibArray with the first two terms of the series, which are 0 and 1.
7. Use a loop to iterate from the third term up to the nth term of the series.
8. Inside the loop, calculate each term of the series by adding the two previous terms and push it to the fibArray.
9. After the loop finishes, return the fibArray, which should now contain the Fibonacci series.

Here is the code snippet that implements the above steps:

function fibonacci(n) {
  let fibArray = [];

  if (n <= 0) {
    return fibArray;
  }

  if (n === 1) {
    fibArray.push(0);
    return fibArray;
  }

  if (n === 2) {
    fibArray.push(0, 1);
    return fibArray;
  }

  fibArray.push(0, 1);

  for (let i = 2; i < n; i++) {
    fibArray.push(fibArray[i - 1] + fibArray[i - 2]);
  }

  return fibArray;
}

console.log(fibonacci(10)); // Example usage: prints [0, 1, 1, 2, 3, 5, 8, 13, 21, 34]

Please note that this code snippet assumes that the value of n will be a positive integer.