Final answer:
The For loop is specifically designed to initialize, test, and increment a counter variable, and is ideal for situations where the number of iterations is known in advance.
Step-by-step explanation:
The loop that is specifically designed to initialize, test, and increment a counter variable is the For loop. This type of loop is structured to perform a set of instructions for a specific number of times. It is commonly used in programming when the number of iterations is known beforehand. The For loop syntax typically includes three parts: initialization of the counter variable, a condition that is checked before each iteration, and an increment or decrement operation that is applied to the counter variable after each iteration.