Linux Shell编程（17）——嵌套循环

#!/bin/bash
# nested-loop.sh: 嵌套的"for" 循环.


outer=1             # 设置外部循环计数.


# 开始外部循环.
for a in 1 2 3 4 5
do
  echo "Pass $outer in outer loop."
  echo "---------------------"
  inner=1           # 重设内部循环的计数.


  # ===============================================
  # 开始内部循环.
  for b in 1 2 3 4 5
  do
    echo "Pass $inner in inner loop."
    let "inner+=1"  # 增加内部循环计数.
  done
  # 内部循环结束.
  # ===============================================


  let "outer+=1"    # 增加外部循环的计数.
  echo              # 每次外部循环之间的间隔.
done               
# 外部循环结束.


exit 0