Operator precedence - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to correctly calculate the expression result.

C

int result = 5 + 3 [1] 2;

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

A+

B-

C/

D*

Attempts:

3 left

💡 Hint

Common Mistakes

Using + instead of * causes the addition to happen first, changing the result.

Using - or / changes the intended calculation.

The multiplication operator (*) has higher precedence than addition, so 3 * 2 is calculated first.

2fill in blank

medium

Complete the code to correctly evaluate the expression with parentheses.

C

int value = (4 + 6) [1] 3;

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

A*

B+

C-

D/

Attempts:

3 left

💡 Hint

Common Mistakes

Ignoring parentheses and multiplying 6 * 3 first.

Using addition instead of multiplication after parentheses.

Parentheses force 4 + 6 to be calculated first, then multiplied by 3.

3fill in blank

hard

Fix the error in the expression to get the correct result.

C

int output = 10 - 4 [1] 2;

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

A*

B+

C/

D-

Attempts:

3 left

💡 Hint

Common Mistakes

Using + or - instead of * changes the calculation order.

Using / divides instead of multiplying.

Multiplication (*) has higher precedence than subtraction, so 4 * 2 is done first.

4fill in blank

hard

Fill both blanks to correctly compute the expression with mixed operators.

C

int result = 8 [1] 2 [2] 3;

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

A*

B+

C-

D/

Attempts:

3 left

💡 Hint

Common Mistakes

Placing addition before multiplication changes the result.

Using subtraction instead of addition changes the final value.

Multiplication (*) is done before addition (+), so 8 * 2 is calculated first, then 3 is added.

5fill in blank

hard

Fill all three blanks to correctly evaluate the complex expression.

C

int final = 12 [1] 4 [2] 2 [3] 3;

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

A-

B*

C+

D/

Attempts:

3 left

💡 Hint

Common Mistakes

Changing the order of operations by using wrong operators.

Ignoring left-to-right evaluation for operators with same precedence.

Division (/) and multiplication (*) have higher precedence and are done left to right, then subtraction (-) is last.