What is the code for buying tokens?
Could you please elaborate on the process for acquiring tokens in the cryptocurrency world? Specifically, what is the code or command that is typically utilized to initiate a token purchase? Is it a specific command within a digital wallet, an exchange platform, or perhaps a smart contract function? Additionally, are there any prerequisite steps that must be taken, such as setting up an account, funding it with cryptocurrency, or approving a token contract? Understanding the precise mechanics of purchasing tokens would greatly assist in navigating the crypto landscape.