Question

what is the function of QB64

Answer 1

Functions receive values passed by the section of the program that called the function. The functions take the values passed to it, performs a calculation or computation and returns a value. By this point you have already used functions many times. UCASE$ is a function that converts text to uppercase

Answer 2

Function in QB64 language are pre-defined programs that which take some data , perform a specific task and return value