Hi there, the challenges were mentioned in the newsletter today (June 29, 2021), but it seems that the real contest was a couple of years ago. Anyway, I like the idea of doing a challenge now and then. So here’s my Javascript solution (basic level):

const fibo50 = function(num) {
// Prints out the 50th number in the Fibonacci sequence
let arr = [1,1]; // Starter array, containing the first 2 elements.
let i=0; // iterator number
while (i <= num) {
// loop determines how many Fibonacci numbers there will be in the final array.
let lastElem = arr[arr.length -1]; // Captures the last array element
let lastButOneElem = arr[arr.length -2]; // Captures the last but one array element.
let newElem = lastElem + lastButOneElem; // Calculates the next Fibonacci number.
arr.push(newElem); // Adds the next Fibonacci number to the array.
i+=1;
};
console.log(arr[49]); // Prints out the 50th array element, which has an index of 49.
};
fibo50(50);

Regards,

Frank.