text: // 找出 NUMBERS 有幾個負數，幾個正數
  let numbers = [97, 1, 50, 90, 100, -5, -20, 9, 0];
  
  let positive = [];
  let negative = [];
  for (number of numbers) {
    if (number >= 0) {
      positive.push(number);
    } else {
      negative.push(number);
    }
  }
  console.log(positive, negative)
  console.log(positive.length, negative.length) // 7, 2