Loop execution flow in Java - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

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

Java

for(int i = 1; i [1] 5; i++) {
    System.out.println(i);
}

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

A<

B<=

C>

D>=

Attempts:

3 left

💡 Hint

Common Mistakes

Using '<' will stop the loop before printing 5.

Using '>' or '>=' will cause the loop not to 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 sum numbers from 1 to 10 using a while loop.

Java

int sum = 0;
int num = 1;
while(num [1] 10) {
    sum += num;
    num++;
}
System.out.println(sum);

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

A<=

B<

C>

D>=

Attempts:

3 left

💡 Hint

Common Mistakes

Using '<' excludes 10 from the sum.

Using '>' or '>=' will cause the loop not to run properly.

The loop should continue while num is less than or equal to 10 to include 10 in the sum.

3fill in blank

hard

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

Java

for(int i = 0; i [1] 5; i++) {
    System.out.println(i);
}

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

A<=

B>=

C<

D>

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'i--' with 'i < 5' causes an infinite loop.

Using '>' with 'i--' is correct but not matching the current code.

The loop should increment i and run while i is less than 5 to avoid infinite loop.

4fill in blank

hard

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

Java

for(int i = [1]; i [2] 10; i += 2) {
    System.out.println(i);
}

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

A2

B1

C<=

D<

Attempts:

3 left

💡 Hint

Common Mistakes

Starting at 1 will print odd numbers.

Using '<' will exclude 10 from printing.

The loop starts at 2 and runs while i is less than or equal to 10 to print even numbers up to 10.

5fill in blank

hard

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

Java

for(int i = [1]; i [2] 1; i [3]) {
    System.out.println(i);
}

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

A1

B>=

C--

D10

Attempts:

3 left

💡 Hint

Common Mistakes

Using '<=' with decrement causes the loop not to run.

Using '++' instead of '--' will cause an infinite loop.

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