nginx - Do I need a SSL certificate for a domain if it redirects? -

If www.abc.com is redirected to abc.com, do I want to www.abc.com Need to get an SSL certificate?

I am asking because I am renewing the SSL certificates for my business and will have to buy new certificates for the www domain and if it is unnecessary then do not want to spend the extra cost.

More specifically, my weight balance layer is NGINX and www.abc.com has been rewritten in https://abc.com/ {params}

. Thank you.

Normally the www standard is included in the certificate. If not, you will have to buy * (Star) certificate.