Irule working, But incorrect statement taking effect

HI , Any one please guide me here

I have below irule,

• when HTTP_REQUEST {
•  
• if { [string tolower [HTTP::host]] equals "test.new.com" } {
• pool new }
•  
• elseif { ! ([HTTP::host] starts_with "www.") } {
•   HTTP::redirect https://www.[HTTP::host][HTTP::uri]}
•  
• else { log local0. "No match found for [HTTP::uri]" } }
•  
• }
• }

When HTTP request coming with not matching host name "test.new.com" , it is taking elseif statement by adding www, host uri, not going to else statement, last one

But the statement elseif is only for starts_with, www request. like www.123.com.

example:

When http request coming with host name " flow.com"

I am seeing URL changing in browser www.flow.com

it is taking elseif condition !

any correction?