Shell 复习——循环

目录

1.For 的易错点

2.while，文件读写，"Ctrl +D " :End of the file；

3.Case_format，注意双分号；

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1.For 的易错点

for (())
do
 commands
done

for i in `seq 1 100`
do
 commands
done

2.while，文件读写，"Ctrl +D " :End of the file；

#!/bin/bash

read -p "Please enter a lower bound: " m
read -p "Please enter a upper bound: " n

sum=0
while [ $m -lt $n ]
do
 sum=$[$sum + $m]
 let m++
done
echo $sum

3.Case_format，注意双分号；

case variable in
condition 1)
commands
;;
condition 2)
commands
;;
commands
;;
esac