Computer science · Grades 8–12
Nested loops
This product applies when the inner count is constant for each outer iteration.
The key idea
This product applies when the inner count is constant for each outer iteration.
total executions = outer iterations × inner iterations
Worked examples
An outer loop runs 22 times. Each time, an inner loop prints once on each of 14 iterations. How many prints occur?
22 × 14 = 308
308
An outer loop runs 17 times. Each time, an inner loop prints once on each of 14 iterations. How many prints occur?
17 × 14 = 238
238
Try it yourself
An outer loop runs 5 times. Each time, an inner loop prints once on each of 20 iterations. How many prints occur?
An outer loop runs 18 times. Each time, an inner loop prints once on each of 20 iterations. How many prints occur?
Check your understanding
Answers and marking notes
- 100
5 × 20 = 100
- 360
18 × 20 = 360
Learning preview · teacher review required. Grade bands are approximate, not official curriculum alignment.