While loop execution model in C Sharp (C#) - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to start a while loop that runs as long as the variable count is less than 5.

C Sharp (C#)

int count = 0;
while ([1])
{
    Console.WriteLine(count);
    count++;
}

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

Acount >= 5

Bcount > 5

Ccount == 5

Dcount < 5

Attempts:

3 left

💡 Hint

Common Mistakes

Using > or >= instead of <

Using == which runs only when count equals 5

The while loop continues as long as the condition is true. To run while count is less than 5, use count < 5.

2fill in blank

medium

Complete the code to stop the while loop when number reaches 10.

C Sharp (C#)

int number = 0;
while (number [1] 10)
{
    Console.WriteLine(number);
    number++;
}

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

A>

B<

C>=

D==

Attempts:

3 left

💡 Hint

Common Mistakes

Using > or >= which never becomes true at start

Using == which runs only once when number is 10

The loop should run while number is less than 10, so the condition is number < 10.

3fill in blank

hard

Fix the error in the while loop condition to avoid an infinite loop.

C Sharp (C#)

int i = 0;
while (i [1] 5)
{
    Console.WriteLine(i);
    // Missing increment
}

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

A>=

B>

C<

D<=

Attempts:

3 left

💡 Hint

Common Mistakes

Using > which never becomes false if i starts at 0

Forgetting to increment i inside the loop

The condition should be i < 5 to run while i is less than 5. But the loop is missing i++ inside, which causes an infinite loop.

4fill in blank

hard

Fill both blanks to create a while loop that prints numbers from 1 to 5.

C Sharp (C#)

int num = 1;
while (num [1] 5)
{
    Console.WriteLine(num);
    num [2] 1;
}

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

A<=

B+=

C-=

D>

Attempts:

3 left

💡 Hint

Common Mistakes

Using < instead of <= misses printing 5

Using -= 1 decreases the number causing infinite loop

The loop runs while num <= 5 to include 5. The increment uses num += 1 to add 1 each time.

5fill in blank

hard

Fill all three blanks to create a while loop that prints even numbers from 2 to 10.

C Sharp (C#)

int val = [1];
while (val [2] 10)
{
    Console.WriteLine(val);
    val [3] 2;
}

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

A2

B<=

C+=

D1

Attempts:

3 left

💡 Hint

Common Mistakes

Starting at 1 prints odd numbers

Using < 10 misses printing 10

Using += 1 prints all numbers, not just even

Start at 2, run while val is less or equal to 10, and increase val by 2 each time to print even numbers.