Shell case 语法简单案例

# 输入标识
read -p "输入标识：" tag
# 判断
case "$tag" in
  # 单个选项
  1)
    echo "tag = 1";;
  # 多个选项
  2|3)
    echo "tag = 2 or tag = 3";;
  # 通配符，任意内容都行
  *)
    echo "default";;
esac

read -p "Are you sure?[y/n]：" sure
case $sure in
  y|Y|yes|YES|Yes)
    echo "you enter '$sure'，OK";;
  n|N|no|NO|No)
    echo "you enter '$sure'，OVER";;
  *)
    echo "error";;
esac