Was ist der Bitcoin Code?

Could you please elaborate on the concept of the Bitcoin Code? I've heard it mentioned in discussions surrounding cryptocurrencies and am curious about its significance. Could you provide a concise yet comprehensive definition? Also, I'm interested in knowing if it's a physical code, a software program, or something else entirely. Additionally, how does it relate to the functionality and operation of Bitcoin, the world's leading cryptocurrency? Clarifying these aspects would help me gain a deeper understanding of the Bitcoin Code and its role in the cryptocurrency ecosystem.