Int, Double, Float number types in Swift - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to declare an integer variable named age with value 25.

Swift

var age: [1] = 25

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

ADouble

BInt

CFloat

DString

Attempts:

3 left

💡 Hint

Common Mistakes

Using Double or Float for whole numbers when Int is more appropriate.

Using String instead of a number type.

The Int type is used to store whole numbers without decimals in Swift.

2fill in blank

medium

Complete the code to declare a variable price with a decimal number type that uses less memory than Double.

Swift

var price: [1] = 19.99

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

AFloat

BDouble

CInt

DBool

Attempts:

3 left

💡 Hint

Common Mistakes

Using Int for decimal numbers causes errors.

Choosing Double when Float is enough.

Float stores decimal numbers but uses less memory than Double. It is suitable when less precision is acceptable.

3fill in blank

hard

Fix the error in the code by choosing the correct type for temperature that can hold decimal values.

Swift

var temperature: [1] = 36.6

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

ABool

BString

CInt

DDouble

Attempts:

3 left

💡 Hint

Common Mistakes

Using Int causes loss of decimal part.

Using String or Bool causes type errors.

Double is the default type for decimal numbers in Swift and provides high precision.

4fill in blank

hard

Fill both blanks to create a variable weight with a decimal type and assign it the value 70.5.

Swift

var weight: [1] = [2]

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

ADouble

B70.5

CFloat

DInt

Attempts:

3 left

💡 Hint

Common Mistakes

Using Int type with decimal value causes errors.

Assigning integer value to a decimal type variable.

Use Double for decimal numbers and assign the value as a decimal literal.

5fill in blank

hard

Fill all three blanks to declare a constant pi with type Double and value 3.14159.

Swift

let [1]: [2] = [3]

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

Api

BDouble

C3.14159

DFloat

Attempts:

3 left

💡 Hint

Common Mistakes

Using var instead of let for constants.

Using Float instead of Double for precision.

Assigning integer value instead of decimal.

Constants use let. pi is the name, Double is the type for decimals, and 3.14159 is the value.