trying if else if. not working.. please help me

when HTTP_REQUEST {
    if { [string tolower [HTTP::host]] equals "abc.com  " }{
        HTTP::redirect "https://abc.com"
    } elseif { [string tolower [HTTP::host]] equals "123.com "}{
        HTTP::redirect "https://123.com"
    } else {
        HTTP::redirect "https://www.xyz.com"
    }
}

The above rule posted by kunjan seems to be accepted by F5 in 11.x code version.