While I read the nested in an if statement, but the judge seems doesn't work!

 
The cat file. TXT 
ABC 
Def 
Ghi 
====================
The cat file. TXT | while read the line; Do 
If the [[${line} - eq "ABC"]]. Then 
Echo "yes" 
The else 
Echo "no" 
Fi 
The done 

Typing is yes, like a statement didn't work, don't know what's the matter, for a great god grant instruction!!!!!

CodePudding user response:

Eq is used for comparison of integer, string comparison with=directly by the

 ${line}="ABC" 

CodePudding user response:

Eq is the comparison of the integer
String comparison==

 
The cat file. TXT | while read the line; Do 
If the [[${line}=="ABC"]]. Then 
Echo "yes" 
The else 
Echo "no" 
Fi 
The done