Challenge: How to Work with Nested For Loops in C++
A nested for loops are almost the same as a nested while loops. They allow you to create a set of iterations within another set of iterations, but in more convenient way. It is particularly useful when dealing with two-dimensional or multi-dimensional data structures with elements your want to iterate through.
Remember like in the previous section, we had a task that involved creating a rectangle in a console using three loops? As you already could guess there is a more straightforward and flexible way to accomplish this.
main.cpp
123456789101112#include <iostream> int main() { for (int i = 0; i < 5; i++) { for (int j = 0; j < 5; j++) { std::cout << '#'; } std::cout << std::endl; } }
Understanding nested loops may be challenging initially, but once you grasp the concept, it becomes easy. So, let's try to practice.
Swipe to start coding
You need to generate a multiplication table of a given size. The table should display all products for numbers from 1 up to the given size.
All the code should be implemented inside the multiplicationTable function.
- Use a
forloop to iterate over rows, with the iteratoristarting from1up tosize. - Inside the row loop, use another
forloop to iterate over columns, with the iteratorjalso running from1up tosize. - For each pair
(i, j), calculate the producti * j. - After finishing each row, print an empty line to separate rows visually.
Solution
solution.cpp
Thanks for your feedback!
single
Ask AI
Ask AI
Ask anything or try one of the suggested questions to begin our chat
Can you give me an example of a nested for loop?
What kind of practice exercises can I try with nested loops?
Can you explain the difference between nested for and nested while loops?
Awesome!
Completion rate improved to 9.09Challenge: How to Work with Nested For Loops in C++
Swipe to show menu
A nested for loops are almost the same as a nested while loops. They allow you to create a set of iterations within another set of iterations, but in more convenient way. It is particularly useful when dealing with two-dimensional or multi-dimensional data structures with elements your want to iterate through.
Remember like in the previous section, we had a task that involved creating a rectangle in a console using three loops? As you already could guess there is a more straightforward and flexible way to accomplish this.
main.cpp
123456789101112#include <iostream> int main() { for (int i = 0; i < 5; i++) { for (int j = 0; j < 5; j++) { std::cout << '#'; } std::cout << std::endl; } }
Understanding nested loops may be challenging initially, but once you grasp the concept, it becomes easy. So, let's try to practice.
Swipe to start coding
You need to generate a multiplication table of a given size. The table should display all products for numbers from 1 up to the given size.
All the code should be implemented inside the multiplicationTable function.
- Use a
forloop to iterate over rows, with the iteratoristarting from1up tosize. - Inside the row loop, use another
forloop to iterate over columns, with the iteratorjalso running from1up tosize. - For each pair
(i, j), calculate the producti * j. - After finishing each row, print an empty line to separate rows visually.
Solution
solution.cpp
Switch to desktop for real-world practiceContinue from where you are using one of the options belowThanks for your feedback!
single
