String interpolation in Swift - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to print the value of the variable inside the string.

Swift

let name = "Alice"
print("Hello, \([1])!")

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

A"name"

Bname()

Cname

DName

Attempts:

3 left

💡 Hint

Common Mistakes

Putting the variable name in quotes inside the interpolation.

Using parentheses after the variable name like a function call.

In Swift, to insert a variable's value inside a string, use \(variableName). Here, \(name) inserts the value of 'name'.

2fill in blank

medium

Complete the code to include the sum of two numbers inside the string.

Swift

let a = 5
let b = 3
print("Sum is \([1])")

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

Aa + b

B"a + b"

Csum(a, b)

Da.plus(b)

Attempts:

3 left

💡 Hint

Common Mistakes

Putting the expression inside quotes, which prints the expression as text.

Using a function that doesn't exist like sum(a, b).

Inside string interpolation, you can write expressions like 'a + b' to calculate and insert the result.

3fill in blank

hard

Fix the error in the string interpolation to correctly show the age.

Swift

let age = 30
print("Age: [1]")

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

A(age)

Bage

C"age"

D\(age)

Attempts:

3 left

💡 Hint

Common Mistakes

Forgetting the \( ) around the variable.

Putting the variable name in quotes.

To insert a variable's value inside a string in Swift, you must use \(variable). Just writing 'age' will print the word, not the value.

4fill in blank

hard

Fill both blanks to create a string that shows the temperature with a degree symbol.

Swift

let temp = 22
let unit = "C"
let message = "Temperature: \([1])\([2])°"

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

Atemp

Bunit

Ctemp + unit

D"temp"

Attempts:

3 left

💡 Hint

Common Mistakes

Putting variables in quotes inside interpolation.

Trying to combine variables inside one interpolation.

Use \(temp) and \(unit) to insert the temperature value and unit inside the string.

5fill in blank

hard

Fill all three blanks to create a greeting with name, age, and city using string interpolation.

Swift

let name = "Bob"
let age = 25
let city = "Paris"
let greeting = "Hi, I am [1], [2] years old, from [3]."

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

A\(name)

B\(age)

C\(city)

Dname

Attempts:

3 left

💡 Hint

Common Mistakes

Using variable names without \( ) inside the string.

Putting variable names in quotes.

Each blank must have the variable inside \( ) to insert its value into the string.