Bash-如何循环变量的最后一位

我正在尝试自动创建文件夹。每个文件夹的文件名开头都应该有一个数字(按for循环[$i]增加)。另外,文件夹名称的其余部分应该由构造为[folder_x]的变量来构建,其中[x]应该也由循环来提升。

更具体地说。 如何构建一个由for循环[$i]和一个被调用的变量组合而成的字符串,但最后还应该使用[$i]?

有关更多详细信息,请参见以下内容:

#!/bin/bash

# Variables to be used
folder_1=1-folderOne
folder_2=2-folderTwo
folder_3=3-folderThree

# This is the folder names that should be created:
  # mkdir /tmp2/1-folderOne
  # mkdir /tmp2/2-folderTwo
  # mkdir /tmp2/3-folderThree

# The for loop should combine the [$i] and above [folder_x],
# where the [x] should also be increased by the loop.
# Below is what i have right now:
# Note! The text "created-by-forloop" is just dummy text,
# and should be replace by the real solution.


for i in 1 2 3
do
  if [ ! -d /tmp2/$i-created-by-forloop ]; then
    mkdir -p /tmp2/$i-created-by-forloop;
  fi
done