how to generate a fibonacci sequence in javascript
// declare the array starting with the first 2 values of the fibonacci sequence
let fibonacci = [0,1];
function listFibonacci(num) {
// starting at array index 1, and push current index + previous index to the array
for (let i = 1; i < num; i++) {
fibonacci.push(fibonacci[i] + fibonacci[i - 1]);
}
console.log(fibonacci);
}
listFibonacci(10);js to confirm fibonnaci
function isFibonacci(n) {
var fib,
a = (5 * Math.pow(n, 2) + 4),
b = (5 * Math.pow(n, 2) - 4)
var result = Math.sqrt(a) % 1 == 0,
res = Math.sqrt(b) % 1 == 0;
//fixed this line
if (result || res == true) // checks the given input is fibonacci series
{
fib = Math.round(n * 1.618); // finds the next fibonacci series of given input
console.log("The next Fibonacci number is " + fib);
} else {
console.log(`The given number ${n} is not a fibonacci number`);
}
}
$('#fib').on("keyup change", function() {
isFibonacci(+this.value)
})Copyright © 2021 Codeinu
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