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Lära Challenge: How to Work with Nested For Loops in C++ | Nested Loops
C++ Loops

bookChallenge: 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

main.cpp

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#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.

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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.

  1. Use a for loop to iterate over rows, with the iterator i starting from 1 up to size.
  2. Inside the row loop, use another for loop to iterate over columns, with the iterator j also running from 1 up to size.
  3. For each pair (i, j), calculate the product i * j.
  4. After finishing each row, print an empty line to separate rows visually.

Lösning

solution.cpp

solution.cpp

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Avsnitt 3. Kapitel 3
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bookChallenge: 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

main.cpp

copy
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.

Uppgift

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.

  1. Use a for loop to iterate over rows, with the iterator i starting from 1 up to size.
  2. Inside the row loop, use another for loop to iterate over columns, with the iterator j also running from 1 up to size.
  3. For each pair (i, j), calculate the product i * j.
  4. After finishing each row, print an empty line to separate rows visually.

Lösning

solution.cpp

solution.cpp

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Var allt tydligt?

Hur kan vi förbättra det?

Tack för dina kommentarer!

Avsnitt 3. Kapitel 3
single

single

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