れば vs なら

I feel like I’ll probably make many posts on how to say “if”, but today in class we talked about these two specifically.

A れば B

Point of view: On the result

A is the key to B

郵便局に行けば、切手を買えますよ。

Vibe: I want to buy a stamp (result). So someone says if you go to the post office you can buy a stamp.

なら

Point of view: On the current info

A is just the background knowledge of B

郵便局に行くなら、切手を買ってきて。

Vibe: I am not in urgent need of a stamp, so if you go to the post office (background knowledge), you can buy it (but if you don’t it’s totally fine)