Loop execution flow in C++ - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to print numbers from 1 to 5 using a for loop.

C++

#include <iostream>

int main() {
    for (int i = 1; i [1] 5; i++) {
        std::cout << i << std::endl;
    }
    return 0;
}

Drag options to blanks, or click blank then click option'

A<

B<=

C>

D>=

Attempts:

3 left

💡 Hint

Common Mistakes

Using < will stop before printing 5.

Using > or >= will cause the loop to not run as expected.

The loop should run while i is less than or equal to 5 to print numbers 1 through 5.

2fill in blank

medium

Complete the code to skip printing the number 3 inside the loop.

C++

#include <iostream>

int main() {
    for (int i = 1; i <= 5; i++) {
        if (i [1] 3) {
            continue;
        }
        std::cout << i << std::endl;
    }
    return 0;
}

Drag options to blanks, or click blank then click option'

A==

B!=

C>

D<

Attempts:

3 left

💡 Hint

Common Mistakes

Using != will skip all numbers except 3.

Using > or < will skip more numbers than intended.

The continue statement should run only when i equals 3 to skip printing 3.

3fill in blank

hard

Fix the error in the while loop condition to stop the loop after printing numbers 1 to 5.

C++

#include <iostream>

int main() {
    int count = 1;
    while (count [1] 5) {
        std::cout << count << std::endl;
        count++;
    }
    return 0;
}

Drag options to blanks, or click blank then click option'

A>=

B<

C>

D<=

Attempts:

3 left

💡 Hint

Common Mistakes

Using < will stop before printing 5.

Using > or >= will cause the loop to never run.

The loop should continue while count is less than or equal to 5 to print numbers 1 through 5.

4fill in blank

hard

Fill both blanks to create a loop that prints even numbers from 2 to 10.

C++

#include <iostream>

int main() {
    for (int num = 2; num [1] 10; num [2]) {
        std::cout << num << std::endl;
    }
    return 0;
}

Drag options to blanks, or click blank then click option'

A<=

B<

C++

D+= 2

Attempts:

3 left

💡 Hint

Common Mistakes

Using < will exclude 10 from output.

Using ++ increments by 1, printing odd numbers too.

The loop runs while num is less than or equal to 10, and increments by 2 each time to print even numbers.

5fill in blank

hard

Fill all three blanks to create a loop that prints numbers from 10 down to 1.

C++

#include <iostream>

int main() {
    for (int i = [1]; i [2] 1; i [3]) {
        std::cout << i << std::endl;
    }
    return 0;
}

Drag options to blanks, or click blank then click option'

A1

B10

C>=

D>

E--

F++

Attempts:

3 left

💡 Hint

Common Mistakes

Starting from 1 will not count down.

Using ++ will increase i instead of decreasing.

Using > instead of >= will exclude 1.

The loop starts at 10, runs while i is greater than or equal to 1, and decrements by 1 each time.