Challenge: Setting Iterations With The While Loop in C++
A while
loop continues executing as long as a specified condition remains true
. But what if we want to repeat a certain chunk of code a fixed number of times, say 3 or 5 times? In these cases, we can achieve this by using a counter variable.
Let's consider the idea in more detail. We already know that expressions like x < 5
return true
if x
is less than five and false
if x
is greater than or equal to five.
This concept aligns with what we need for a fixed number of repetitions. However, to make this work, we need to set up a counter variable x
and update it inside the loop. Look at the code below step by step:
main.cpp
123456789101112#include <iostream> int main() { // create variable for loop condition int i = 0; // variables for loops are usually called i or j while (i < 5) { std::cout << "Hello!" << std::endl; i++; // incrementing the i } }
The choice of the initial value for a variable and the increment used in a loop will impact the number of iterations. For instance, in this case initializing the variable with 3 will result in just 2 iterations.
Additionally, you can adjust the increment value, which will also affect the iteration count. The specific values to use for initialization and incrementing depend on the specific requirements and objectives of your task. You can try to experiment by modifying the starting value, altering the condition, or adjusting the increment value.
Swipe to start coding
You need to calculate the average value of transactions in a banking system. To do this, use an array
, a while
loop, and variables to store the sum
and the iterator
. All the code should be implemented inside the calculateAverage
function.
- Initialize the variable
sum
. It will hold the total of all transactions. - Initialize the variable
i
. This will act as an iterator tracking the current position in thetransactions
. - The
while
loop should run as long asi
is less than the number of elements in thetransactions
(variablesize
). - Inside the loop, add the value of the current transaction to the variable
sum
. - Increment the variable
i
by one on each iteration. - After the loop finishes, calculate the
average
by dividingsum
by the number of transactions.
Løsning
solution.cpp
Tak for dine kommentarer!
single
Spørg AI
Spørg AI
Spørg om hvad som helst eller prøv et af de foreslåede spørgsmål for at starte vores chat
Can you show me an example of using a counter variable in a while loop?
What happens if I forget to update the counter variable inside the loop?
How does changing the increment value affect the number of loop iterations?
Awesome!
Completion rate improved to 9.09
Challenge: Setting Iterations With The While Loop in C++
Stryg for at vise menuen
A while
loop continues executing as long as a specified condition remains true
. But what if we want to repeat a certain chunk of code a fixed number of times, say 3 or 5 times? In these cases, we can achieve this by using a counter variable.
Let's consider the idea in more detail. We already know that expressions like x < 5
return true
if x
is less than five and false
if x
is greater than or equal to five.
This concept aligns with what we need for a fixed number of repetitions. However, to make this work, we need to set up a counter variable x
and update it inside the loop. Look at the code below step by step:
main.cpp
123456789101112#include <iostream> int main() { // create variable for loop condition int i = 0; // variables for loops are usually called i or j while (i < 5) { std::cout << "Hello!" << std::endl; i++; // incrementing the i } }
The choice of the initial value for a variable and the increment used in a loop will impact the number of iterations. For instance, in this case initializing the variable with 3 will result in just 2 iterations.
Additionally, you can adjust the increment value, which will also affect the iteration count. The specific values to use for initialization and incrementing depend on the specific requirements and objectives of your task. You can try to experiment by modifying the starting value, altering the condition, or adjusting the increment value.
Swipe to start coding
You need to calculate the average value of transactions in a banking system. To do this, use an array
, a while
loop, and variables to store the sum
and the iterator
. All the code should be implemented inside the calculateAverage
function.
- Initialize the variable
sum
. It will hold the total of all transactions. - Initialize the variable
i
. This will act as an iterator tracking the current position in thetransactions
. - The
while
loop should run as long asi
is less than the number of elements in thetransactions
(variablesize
). - Inside the loop, add the value of the current transaction to the variable
sum
. - Increment the variable
i
by one on each iteration. - After the loop finishes, calculate the
average
by dividingsum
by the number of transactions.
Løsning
solution.cpp
Tak for dine kommentarer!
single