Javascript Fibonacci sequence examples with generators

fibonacci-generator.js

function *fib() {
  var temp, num1 = 0, num2 = 1;
  while (1) {
    yield num1;
    temp = num1;
    num1 = num2;
    num2 += temp;
  }
}
 
// fibonacci generator function
var genFib = fib();

// Print the first ten numbers in the fibonacci sequence.
for (var arr = [], i = 0; i < 10; i++) {
  arr.push(genFib.next().value);
}

let str = arr.join("\n");
console.log("1st 10 fibonacci sequence numbers:\n" + str);