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Update Shell.md

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Kou Shuang 2019-08-26 23:42:21 +08:00
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docs/operating-system/Shell.md
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@ -290,7 +290,7 @@ for i in ${array[@]};do echo $i ;done # 遍历数组，数组元素为空，没
a=3;b=3; a=3;b=3;
val=`expr $a + $b` val=`expr $a + $b`
#输出：Total value : 6 #输出：Total value : 6
echo "Total value : $val echo "Total value : $val"
``` ```