编程Tag： js let 基础 sum 练习题 两数 jia jian

 function getSum(x, y) {
      let jia = x + y
      let jian = x - y
      return [jia, jian]
    }
    let sum = getSum(1, 2)
    document.write(`和是:${[sum[0]]}差是:${sum[1]}`)
    document.write('和是' + sum[0] + '差是' + sum[1])