斐波那契数列

function getFibonacci(n) {  
  var fibarr = [];
  var i = 0;
  while(i<n) {
    if(i<=1) {
      fibarr.push(i);
    }else{
      fibarr.push(fibarr[i-1] + fibarr[i-2])
    }
    i++;
  }

  return fibarr;
}