Linux - Shell - arithmetic expressions - Relational Operators

1. Outline
   1. Based on the shell $ (()) relational operators
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
   
   # 关系运算符
   # 结果是 真/假(1/0)
   
   arg1=4
   arg2=5
   
   # 1. <
   result1=$((arg1<arg2))
   echo $result1
   
   # 2. >
   result2=$((arg1>arg2))
   echo $result2
   
   # 3. <=
   result3=$((arg1<=arg2))
   echo $result3
   
   # 4. >=
   result4=$((arg1<=arg2))
   echo $result4
   
   # 5. ==
   result5=$((arg1==arg2))
   echo $result5
   
   # 6. !=
   result6=$((arg1!=arg2))
   echo $result6
   
   # 7. &&
   # 坑: 如果 arg1 为 假, 则 arg2 不会被验证
   result7=$((arg1&&arg2))
   echo $result7
   
   # 8. ||
   # 坑: 如果 arg1 为 真, 则 arg2 不会被验证
   result8=$((arg1||arg2))
   echo $result8