While loops in MATLAB - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to create a while loop that runs as long as x is less than 5.

MATLAB

x = 1;
while [1]
    disp(x);
    x = x + 1;
end

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

Ax > 5

Bx < 5

Cx == 5

Dx >= 5

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'x > 5' which never becomes true initially.

Using 'x == 5' which runs only when x equals 5.

Using 'x >= 5' which is false at start.

The condition x < 5 makes the loop run while x is less than 5.

2fill in blank

medium

Complete the code to stop the loop when the variable 'count' reaches 10.

MATLAB

count = 0;
while [1]
    count = count + 1;
    disp(count);
end

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

Acount < 10

Bcount ~= 10

Ccount > 10

Dcount == 10

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'count == 10' which runs only when count equals 10.

Using 'count > 10' which is false at start.

Using 'count ~= 10' which runs when count is not 10, causing an extra iteration.

The loop continues while count < 10, stopping when count reaches 10.

3fill in blank

hard

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

MATLAB

num = 5;
while [1]
    disp(num);
    num = num - 1;
end

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

Anum > 0

Bnum >= 5

Cnum == 5

Dnum < 0

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'num == 5' which never changes inside the loop.

Using 'num >= 5' which is true initially but false after decrement.

Using 'num < 0' which is false at start.

The condition num > 0 ensures the loop stops when num reaches 0, preventing infinite looping.

4fill in blank

hard

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

MATLAB

i = 1;
while [1]
    disp(i);
    i = i [2] 1;
end

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

Ai <= 5

Bi < 5

C+

D-

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'i < 5' which stops before printing 5.

Using '-' operator which decreases i causing infinite loop.

The loop runs while i <= 5 and increments i by 1 each time.

5fill in blank

hard

Fill all three blanks to create a while loop that sums numbers from 1 to 5.

MATLAB

sum = 0;
i = 1;
while [1]
    sum = sum + i;
    i = i [2] 1;
end
result = sum [3] 15;

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

Ai <= 5

B+

C==

D<

Attempts:

3 left

💡 Hint

Common Mistakes

Using '<' instead of '<=' causing missing last number.

Using '-' operator decreasing i causing infinite loop.

Using '=' instead of '==' for comparison.

The loop runs while i <= 5, adds i to sum, increments i by 1, and checks if sum equals 15.