Indicates a decision or suggestion; 'well then', 'in that case', 'so'.
Long explanation:
The A。じゃ、~B。grammar point is used to express a decision, suggestion, or course of action based on a given situation or information. It can be translated as 'well then', 'in that case', or 'so' in English. This grammar works with any form of sentence, whether it's a verb, noun, い-adjective, or な-adjective in both parts (A and B).