SHELL中如何对一个变量进行算术操作（加减）

柳鲲鹏发布时间：2018-10-09 16:20:15 ，浏览量：0

柳鲲鹏

正确做法是：

pos=5
pos=`expr $pos - 1`
echo $pos

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SHELL中如何对一个变量进行算术操作（加减）

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