linux中的反引号的疑惑？

Answer 1

``This is generally used to enclose some instructions.
addarray is a function. Of course, you cannot do this. It is declared by you yourself/

`` is to execute the instructions inside you, such as

function f1
{

ehco "test"

}

f1_ret=f1

The terminal will prompt you that test not found, but it actually executes the f1 function
-bash: test: command not found