.htaccess - How with an htaccess can I redirect an url to a different one -

how can htaccess file redirect old url new one?

example:

from: http://www.website.com/product/1283794 (requested)

to: http://www.website.com/ecom/product/1283794 (rerouted)

add htaccess file in document root:

redirect 301 /product/1283794 /ecom/product/1283794 

pretty easy isn't it? should take @ mod_alias documentation. it's pretty cut , dry, , obvious.