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JavaScript: Get the first n Fibonacci numbers

JavaScript Function: Exercise-6 with Solution

Write a JavaScript program to get the first n Fibonacci numbers.

Note: The Fibonacci Sequence is the series of numbers: 0, 1, 1, 2, 3, 5, 8, 13, 21, 34, . . . Each subsequent number is the sum of the previous two.

Pictorial Presentation:

JavaScript: Get the first n Fibonacci numbers

Sample Solution:-

HTML Code:

<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <title>Fibonacci Series</title>
</head>
<body>

</body>
</html>

JavaScript Code:

var fibonacci_series = function (n) 
{
  if (n===1) 
  {
    return [0, 1];
  } 
  else 
  {
    var s = fibonacci_series(n - 1);
    s.push(s[s.length - 1] + s[s.length - 2]);
    return s;
  }
};

 console.log(fibonacci_series(8));
 

Output:

[0,1,1,2,3,5,8,13,21]

Flowchart:

Flowchart: JavaScript recursion function- Get the first n Fibonacci numbers

Live Demo:

See the Pen javascript-recursion-function-exercise-6 by w3resource (@w3resource) on CodePen.


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Next: Write a JavaScript program to check whether a number is even or not.

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JavaScript: Tips of the Day

Add padding to the beginning of a string

const name = 'Minta Lofton';
console.log(name.padStart(13));
console.log(name.padStart(2));

With the padStart method, we can add padding to the beginning of a string. The value passed to this method is the total length of the string together with the padding. The string "Minta Lofton" has a length of 12. name.padStart(13) inserts 1 space at the start of the string, because 12 + 1 is 13.
If the argument passed to the padStart method is smaller than the length of the array, no padding will be added.

Ref: https://bit.ly/3jFRBje