javascript输出菱形

以下是JavaScript输出菱形的代码：

function printDiamond(n) {
  for (let i = 1; i <= n; i++) {
    let row = "";
    for (let j = 1; j <= n - i; j++) {
      row += " ";
    }
    for (let k = 1; k <= i * 2 - 1; k++) {
      row += "*";
    }
    console.log(row);
  }
  for (let i = n - 1; i >= 1; i--) {
    let row = "";
    for (let j = 1; j <= n - i; j++) {
      row += " ";
    }
    for (let k = 1; k <= i * 2 - 1; k++) {
      row += "*";
    }
    console.log(row);
  }
}

printDiamond(5);

输出结果为：

    *
   ***
  *****
 *******
*********
 *******
  *****
   ***
    *