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
for
loop to iterate over rows, with the iteratori
starting from1
up tosize
. - Inside the row loop, use another
for
loop to iterate over columns, with the iteratorj
also running from1
up tosize
. - For each pair
(i, j)
, calculate the producti * j
. - After finishing each row, print an empty line to separate rows visually.
Lösung
solution.cpp
Danke für Ihr Feedback!
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Challenge: How to Work with Nested For Loops in C++
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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
for
loop to iterate over rows, with the iteratori
starting from1
up tosize
. - Inside the row loop, use another
for
loop to iterate over columns, with the iteratorj
also running from1
up tosize
. - For each pair
(i, j)
, calculate the producti * j
. - After finishing each row, print an empty line to separate rows visually.
Lösung
solution.cpp
Danke für Ihr Feedback!
single