Which term describes loops inside loops?

Which term describes loops inside loops?

• A. Round
• B. Input command
• C. Compiler
• D. Nested iteration

Answer: (D)

When one loop sits inside another, you’re dealing with nested iteration. The inner loop runs completely for each single pass of the outer loop, so you can sweep through multi-dimensional data, like every cell in a grid or every position in a matrix. For example, to visit every row and column in a 2D array, the outer loop might go over rows and the inner loop goes over columns, giving a total of rows × columns iterations. That arrangement is what we call nested iteration. The other terms don’t describe this structure: a round isn’t used to name a looping pattern, an input command is about reading data, and a compiler is a tool that translates code rather than describing how loops are organized.

When one loop sits inside another, you’re dealing with nested iteration. The inner loop runs completely for each single pass of the outer loop, so you can sweep through multi-dimensional data, like every cell in a grid or every position in a matrix. For example, to visit every row and column in a 2D array, the outer loop might go over rows and the inner loop goes over columns, giving a total of rows × columns iterations. That arrangement is what we call nested iteration.

The other terms don’t describe this structure: a round isn’t used to name a looping pattern, an input command is about reading data, and a compiler is a tool that translates code rather than describing how loops are organized.