Using the return value of a function in a shell script

#!/bin/bash-  function mytest () {    echo "arg1 = $"      If [$ = "1"]; then        return 1    else        return 0
   
    fi}if MyTest 2; Then        echo "Aaaaaaaaaa" fi
   

Execution Result:

Change it a little bit.

#!/bin/bash-
function mytest ()
{
echo "Arg1 = $"
if [$ = "1"]; then
Return 1
Else
return 0
Fi
}
If mytest 1; Then
echo "AAAAAAAAAA"
Fi

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The variables defined in the shell are global, and the variables defined above the function are still visible inside the function

#!/bin/bash-    g_var=  function mytest2 ()  {      echo "mytest2"      echo "args $"      g_var=$1        return 0  }    mytest2 1  echo "return $?"    Echo  

　　

Using the return value of a function in a shell script