For loops in MATLAB - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to create a for loop that counts from 1 to 5.

MATLAB

for i = [1]
    disp(i)
end

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

A1 to 5

B1,5

C1:5

D[1 5]

Attempts:

3 left

💡 Hint

Common Mistakes

Using commas instead of colon to create the range.

Using square brackets which create a vector but not a range for the loop.

The syntax 1:5 creates a range from 1 to 5 in MATLAB, which is used in the for loop.

2fill in blank

medium

Complete the code to sum numbers from 1 to 10 using a for loop.

MATLAB

total = 0;
for n = 1:10
    total = total + [1];
end

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

A10

Btotal

C1

Dn

Attempts:

3 left

💡 Hint

Common Mistakes

Adding the total to itself instead of the loop variable.

Adding a fixed number like 10 or 1 instead of the loop variable.

Inside the loop, n is the current number from 1 to 10, so we add it to total.

3fill in blank

hard

Fix the error in the for loop to display numbers from 5 down to 1.

MATLAB

for i = [1]
    disp(i)
end

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

A1:5

B5:-1:1

C5:1

D1:-1:5

Attempts:

3 left

💡 Hint

Common Mistakes

Using 5:1 which counts up and results in an empty loop.

Using 1:-1:5 which is an invalid range.

To count down from 5 to 1, use the syntax 5:-1:1 which means start at 5, step by -1, end at 1.

4fill in blank

hard

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

MATLAB

for i = [1]:[2]:10
    disp(i)
end

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

A2

B1

D3

Attempts:

3 left

💡 Hint

Common Mistakes

Using 1 as the start or step which prints odd numbers.

Using 3 as the step which skips some even numbers.

The loop starts at 2 and steps by 2 to print even numbers up to 10.

5fill in blank

hard

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

MATLAB

for [1] = [2]:[3]:5
    disp([1]^2)
end

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

Ai

B1

D2

Attempts:

3 left

💡 Hint

Common Mistakes

Using a step other than 1 which skips numbers.

Using a variable name other than i which is conventional here.

The loop variable i goes from 1 to 5 in steps of 1, and we display its square.