👉 Bifer is a concept in computer science and programming that refers to a variable or function that can change its value based on other variables. It can be used as an alternative to using global variables, which are fixed values that cannot be changed. In Python, for example, you might have a function that calculates the sum of two numbers, but it could also use a global variable `sum` to keep track of the total. If you change the value of `sum`, so too would the value