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【忘備録】bashでの計算式

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要はCで言うところのa=a+1;とかa++;

bashって色々面倒で、計算式は((計算式))にする必要があるので、忘れないように

a=a+1

a=$(($a+1))

a++

let a++
((a++))
((a += 1))
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