Linux shell 常用 加減乘除記錄

• + 運算

    count=0
    let count=count+2
    let count+=2
    echo $count

• - 運算

    count=0
    let count=count-2
    let count-=2
    echo $count

• 運算

    count=1
    let count=count*2
    let count*=2
    echo $count

• / 運算

    count=8
    let count=count/2
    let count/=2
    echo $count

• 取 余

    count=33
    let count=count%10
    let count%=2
    echo $count