A loop allows developers to execute a set of instructions repeatedly without writing the same code multiple times. It typically continues until a specific condition is met.
Common types of loops include 'for' loops, 'while' loops, and 'do-while' loops. Each type serves different needs based on the situation and logic required.
For example, in a 'for' loop, you might iterate over a list of numbers to calculate their sum. This reduces redundancy and makes code more manageable.
Loops are essential in programming for tasks like iterating through data, automating repetitive actions, and enhancing efficiency in code execution.