javascriptfibonacci

Generating Fibonacci Sequence

var x = 0;
var y = 1;
var z;

fib[0] = 0;
fib[1] = 1;

for (i = 2; i <= 10; i++) {
  alert(x + y);
  fib[i] = x + y;
  x = y;
  z = y;
}

I'm trying to get to generate a simple Fibonacci Sequence but there no output.

Can anybody let me know what's wrong?

Solution

  • You have never declared fib to be an array. Use var fib = []; to solve this.

    Also, you're never modifying the y variable, neither using it.

    The code below makes more sense, plus, it doesn't create unused variables:

    var i;
var fib = [0, 1]; // Initialize array!

for (i = 2; i <= 10; i++) {
  // Next fibonacci number = previous + one before previous
  // Translated to JavaScript:
  fib[i] = fib[i - 2] + fib[i - 1];
  console.log(fib[i]);
}