Which statement best describes a for loop?

Which statement best describes a for loop?

• A. A block of code that runs indefinitely.
• B. A block of code that runs a set number of times.
• C. A memory management technique.
• D. A type of markup language.

Answer: (B)

A for loop is a construct that repeats a block of code a fixed number of times, controlled by a counter. It usually has three parts: initialization of the counter, a condition that keeps the loop going, and an update step that changes the counter after each iteration. Because the number of iterations is determined in advance, you can predict exactly how many times the body will run. For example, looping from 0 to n-1 processes n items. This makes the description that the block runs a set number of times the best fit for what a for loop does. In contrast, something that runs indefinitely describes a different pattern, not a for loop. And memory management techniques or markup languages aren’t about iterating a block of code at all.

A for loop is a construct that repeats a block of code a fixed number of times, controlled by a counter. It usually has three parts: initialization of the counter, a condition that keeps the loop going, and an update step that changes the counter after each iteration. Because the number of iterations is determined in advance, you can predict exactly how many times the body will run. For example, looping from 0 to n-1 processes n items. This makes the description that the block runs a set number of times the best fit for what a for loop does. In contrast, something that runs indefinitely describes a different pattern, not a for loop. And memory management techniques or markup languages aren’t about iterating a block of code at all.