Sum All Odd Fibonacci Numbers

function sumFibs(num) {
  //斐波那契，前两数之和
  let sum= 1
  let preQi= 1
  let qi= 1
  let nextQi= 0
  while(qi<= num) {
    if(qi%2 !== 0) {//奇数斐波那契参与求和
      sum+=qi
    }
    nextQi= preQi+qi
    preQi= qi
    qi= nextQi
  }
  return sum;
}
sumFibs(1000);

测试数据：

sumFibs(1) should return a number. sumFibs(1000) should return 1785. sumFibs(4000000) should return 4613732. sumFibs(4) should return 5. sumFibs(75024) should return 60696. sumFibs(75025) should return 135721.