Python Loops Fundamentals: Differences and Application Scenarios between for and while Loops

This article introduces two basic Python loop structures: for and while, which are used to reduce repetitive code and handle repeated tasks. The for loop iterates over iterable objects (such as lists, strings, range, etc.). For example, printing numbers 1-5 or calculating the average score of a list. It is implemented with the syntax "for variable in iterable object", and the number of iterations is determined by the length of the sequence. It is suitable for scenarios where the traversal object is clearly known. The while loop is based on conditional judgment and controlled by "while condition". For example, calculating the sum of 1-10 or verifying user input. The condition must be modified within the loop to avoid infinite loops. It is suitable for scenarios where the loop is controlled by conditions. Core difference: for traverses a fixed sequence, while controls the number of iterations through conditions. Note should be taken of avoiding infinite loops in while and errors when for traverses non-iterable objects.