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

Practice - 5 Tasks

1fill in blank

easy

Complete the code to print numbers from 0 to 4 using a for loop.

C Sharp (C#)

for (int i = 0; i [1] 5; i++)
{
    Console.WriteLine(i);
}

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

A<=

B>

C>=

D<

Attempts:

3 left

💡 Hint

Common Mistakes

Using <= causes the loop to run one extra time.

Using > or >= makes the loop not run at all.

The for loop runs while i is less than 5, so it prints 0 to 4.

2fill in blank

medium

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

C Sharp (C#)

int sum = 0;
for (int num = 1; num [1] 5; num++)
{
    sum += num;
}
Console.WriteLine(sum);

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

A<=

B<

C>

D>=

Attempts:

3 left

💡 Hint

Common Mistakes

Using < excludes 5, so sum is less than expected.

Using > or >= causes the loop not to run.

The loop includes 5 by using <=, so sum is 1+2+3+4+5 = 15.

3fill in blank

hard

Fix the error in the for loop condition to count down from 5 to 1.

C Sharp (C#)

for (int i = 5; i [1] 1; i--)
{
    Console.WriteLine(i);
}

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

A>=

B<

C<=

D==

Attempts:

3 left

💡 Hint

Common Mistakes

Using < or <= causes the loop to never run.

Using == runs the loop only once.

The loop runs while i is greater than or equal to 1, counting down.

4fill in blank

hard

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

C Sharp (C#)

for (int i = [1]; i [2] 10; i += 2)
{
    Console.WriteLine(i);
}

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 < excludes 10 from printing.

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

5fill in blank

hard

Fill all three blanks to create a for loop that prints the squares of numbers from 1 to 5.

C Sharp (C#)

for (int [1] = 1; [2] [3] 5; [1]++)
{
    Console.WriteLine([1] * [1]);
}

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

Ai

C<=

D<

Attempts:

3 left

💡 Hint

Common Mistakes

Using different variable names causes errors.

Using < excludes 5 from the loop.

The loop variable i starts at 1 and runs while it is less than or equal to 5, printing squares.