Linux shell 常用加减乘除记录

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    count=0

    let count=count+2

    let count+=2

    echo $count

    count=0

    let count=count-2

    let count-=2

    echo $count

    count=1

    let count=count*2

    let count*=2

    echo $count

    count=8

    let count=count/2

    let count/=2

    echo $count

    count=33

    let count=count%10

    let count%=2

    echo $count