👉 Preentrance is a term used in mathematics and computer science that refers to a point where an input value should be considered as zero. In mathematical terms, if we have a function or algorithm that depends on some input values (like a function for calculating a sum), then the preentrance condition is that all of those inputs must equal zero before the function can even start computing anything. For example, consider the following function in Python: ```python def add(x, y): return x
