Which statement best describes the difference between a 'for' loop and a 'while' loop?

The statement that a 'for' loop has a predetermined number of iterations while a 'while' loop continues until a condition is no longer true accurately captures the fundamental differences between these two types of loops.

A 'for' loop is typically used when the number of iterations is known beforehand, allowing the programmer to define the initialization, condition, and increment/decrement all in one line. This structure makes 'for' loops particularly efficient for iterating over arrays, collections, or ranges where the number of steps is clearly defined.

In contrast, a 'while' loop is more flexible and is designed to execute as long as a specific condition remains true. This means that the number of iterations is not predetermined and can vary based on the input or state within the loop itself. This feature makes 'while' loops ideal for situations where the end condition is not known at the beginning, such as reading user input until a certain value is entered or processing data until a specific criteria is met.

Understanding this distinction helps in selecting the appropriate loop structure based on the requirements of the task at hand, leading to cleaner and more efficient code.