Try catch of Bash

Recently I wrote shell. deeply if else tedious . Refer to csdn A blogger . The result code is useless . So I wrote a template myself . When I write my blog, I turn to his quotation stackoverflow Link to find . He's missing && . :)

My template

:
(
    :
    ##  To add code, put ： Get rid of .
) || {
    
    case $? in
    *)
        perror $?
        ;;
    esac
}

stackoverflow Templates

# set -e 

{
     # try

    command1 &&
    #save your output

} || {
     # catch
    # save log for exception 
}