Digital friends have many functions. For example, digital friends can be used as a part of computer programs to perform various calculations and operations by using numbers to help people better process and analyze data. Digital friends can also be used in cryptography to protect the security of information by encrypting and decrypting numbers. In addition, digital friends can also be used as a sign of authentication and security for authentication and fraud prevention. In a word, digital friends are playing an increasingly important role in our daily life and work.