Counter-based while loop in Java - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to initialize the counter variable.

Java

int count = [1];

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

A-1

B1

C0

D10

Attempts:

3 left

💡 Hint

Common Mistakes

Starting the counter at 1 instead of 0.

Using a negative number as the starting value.

The counter variable should start at 0 to count from the beginning.

2fill in blank

medium

Complete the code to write the while loop condition to run 5 times.

Java

while (count [1] 5) {
    System.out.println(count);
    count++;
}

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

A>=

B<

C>

D==

Attempts:

3 left

💡 Hint

Common Mistakes

Using greater than instead of less than.

Using equality which runs only once.

The loop should run while count is less than 5 to execute 5 times (0 to 4).

3fill in blank

hard

Fix the error in the loop increment statement.

Java

while (count < 5) {
    System.out.println(count);
    count[1];
}

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

A++

B+

C--

D+=

Attempts:

3 left

💡 Hint

Common Mistakes

Using '+' without assignment.

Using '--' which decreases the counter.

The increment operator '++' increases count by 1 each loop.

4fill in blank

hard

Fill both blanks to create a loop that counts down from 5 to 1.

Java

int count = [1];
while (count [2] 0) {
    System.out.println(count);
    count--;
}

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

A5

B0

C>

D<

Attempts:

3 left

💡 Hint

Common Mistakes

Starting count at 0 instead of 5.

Using '<' which would cause an infinite loop.

Start count at 5 and loop while count is greater than 0 to count down.

5fill in blank

hard

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

Java

int count = [1];
while (count [2] 10) {
    System.out.println(count);
    count [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 instead of 2.

Using '<' which excludes 10.

Using '+' without assignment.

Start at 2, loop while count is less or equal to 10, and add 2 each time to print even numbers.