Arithmetic operators and overflow in Swift - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to add two integers and store the result.

Swift

let sum = 5 [1] 3

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

A+

B-

C/

D*

Attempts:

3 left

💡 Hint

Common Mistakes

Using subtraction or multiplication instead of addition.

The + operator adds two numbers together.

2fill in blank

medium

Complete the code to multiply two integers and store the result.

Swift

let product = 7 [1] 4

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

A/

B*

C-

D+

Attempts:

3 left

💡 Hint

Common Mistakes

Using addition or division instead of multiplication.

The * operator multiplies two numbers.

3fill in blank

hard

Fix the error in the code to correctly handle overflow addition.

Swift

let result = UInt8.max [1] 1

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

A-

B+

C&+

D&-

Attempts:

3 left

💡 Hint

Common Mistakes

Using normal addition operator which causes runtime error on overflow.

The &+ operator performs addition with overflow, wrapping around on overflow.

4fill in blank

hard

Fill both blanks to perform overflow subtraction and multiplication.

Swift

let difference = UInt8.min [1] 1
let product = 10 [2] 20

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

A&-

B*

C+

D&+

Attempts:

3 left

💡 Hint

Common Mistakes

Using normal subtraction which causes error on underflow.

&- subtracts with overflow wrapping, * multiplies normally.

5fill in blank

hard

Fill all three blanks to create a dictionary with keys as strings and values as overflow sums.

Swift

let results = ["a": 5 [1] 250, "b": 10 [2] 245, "c": 15 [3] 240]

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

A&+

B+

C-

D&-

Attempts:

3 left

💡 Hint

Common Mistakes

Using normal + operator which can cause overflow errors.

Using &+ ensures addition wraps around on overflow for all values.