We are required to write a JavaScript function that takes in a single number as the first and the only argument, let’s call that number n.
The function should return the nth element of the Fibonacci series.
For example −
fibonacci(10) should return 55 fibonacci(3) should return 2 fibonacci(6) should return 8 fibonacci(2) should return 1
Example
const fibonacci = (num = 1) => { const series = [1, 1]; for (let i = 2; i < num; i++) { const a = series[i - 1]; const b = series[i - 2]; series.push(a + b); }; return series[num - 1]; }; console.log(fibonacci(10)); console.log(fibonacci(6)); console.log(fibonacci(3)); console.log(fibonacci(2));
Output
And the output in the console will be −
55 8 2 1