Linux - Shell - arithmetic expressions - bit computing

1. Outline
   1. Based on the shell $ (()) bitwise
2. background
   1. Review shell script
   2. Make up the numbers right
3. ready
   1. surroundings
      1. the
         1. centos7

1. Bitwise

1. Code

   #!/bin/bash
   
   # 位运算
   arg1=2
   arg2=8
   
   # 位运算
   # 1. <<
   var1=$((arg1 << 2))
   echo $var1
   
   # 2. >>
   var2=$((arg1 >> 1))
   echo $var2
   
   # 3. &
   var3=$((arg1&arg2))
   echo $var3
   
   # 4. |
   var4=$((arg1|arg2))
   echo $var4
   
   # 5. ~
   var5=$((~arg1))
   echo $var5
   
   # 6. !: 这个是 逻辑非, 不知道怎么混进来了
   var6=$((!!arg1))
   echo $var6
   
   # 7. ^
   var7=$((arg1 ^ arg2))
   echo $var7