What describes loops within loops?

What describes loops within loops?

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

Answer: (C)

Nested iteration describes loops inside loops. The inner loop runs through its entire sequence for every single pass of the outer loop. This lets you handle multi-dimensional data or every combination of two indices. For example, to touch every cell in a 3 by 4 grid, the outer loop goes through the three rows and the inner loop goes through the four columns for each row, totaling 12 iterations. The total work is the product of the two counts. This pattern is called nested loops or nested iteration. It isn’t just a single loop, nor an input command, and it isn’t an interpreter.

Nested iteration describes loops inside loops. The inner loop runs through its entire sequence for every single pass of the outer loop. This lets you handle multi-dimensional data or every combination of two indices. For example, to touch every cell in a 3 by 4 grid, the outer loop goes through the three rows and the inner loop goes through the four columns for each row, totaling 12 iterations. The total work is the product of the two counts. This pattern is called nested loops or nested iteration. It isn’t just a single loop, nor an input command, and it isn’t an interpreter.