Operator precedence in MATLAB - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to calculate the correct result using operator precedence.

MATLAB

result = 3 + 4 * [1];

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

A2

B5

C1

D3

Attempts:

3 left

💡 Hint

Common Mistakes

Adding before multiplying, which changes the result.

Ignoring operator precedence and calculating left to right.

Multiplication (*) has higher precedence than addition (+), so 4 * 2 is calculated first, then 3 is added.

2fill in blank

medium

Complete the code to correctly compute the expression with parentheses affecting precedence.

MATLAB

result = (3 + 4) * [1];

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

A1

B5

C2

D3

Attempts:

3 left

💡 Hint

Common Mistakes

Multiplying before adding despite parentheses.

Ignoring parentheses and calculating left to right.

Parentheses change the order: 3 + 4 is calculated first, then multiplied by 2.

3fill in blank

hard

Fix the error in the expression to get the correct result considering operator precedence.

MATLAB

result = 10 - 4 / [1] + 2;

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

A2

B5

C4

D3

Attempts:

3 left

💡 Hint

Common Mistakes

Performing subtraction before division.

Ignoring operator precedence and calculating left to right.

Division has higher precedence, so 4 / 3 is calculated first, then subtraction and addition follow left to right.

4fill in blank

hard

Fill both blanks to create a dictionary comprehension that uses operator precedence correctly.

MATLAB

result = containers.Map([1], [2]);

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A{'a', 'b', 'c'}

B[1, 2, 3]

C[3, 4, 5]

D{'x', 'y', 'z'}

Attempts:

3 left

💡 Hint

Common Mistakes

Using square brackets for keys instead of curly braces.

Mixing types between keys and values.

The keys must be a cell array of strings, and the values a numeric array. This matches MATLAB's containers.Map syntax.

5fill in blank

hard

Fill all three blanks to correctly compute a complex expression respecting operator precedence.

MATLAB

result = ([1] + [2]) * [3];

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

A5

B3

C2

D4

Attempts:

3 left

💡 Hint

Common Mistakes

Multiplying before adding.

Ignoring parentheses.

Parentheses force addition of 3 and 4 first, then multiply by 2.