👉 A previsor in computer science is a type of function that takes an input argument and returns a value. It's like having a key to unlock a door, but with more flexibility - it can take any input and return the same output. For example: ```python def find_max(nums): max_num = nums[0] for num in nums: if num > max_num: max_num = num return max_num ``` In this example, `find