Conditions

Question 1

What is a Boolean type in Swift?

Answer 1

A Boolean type returns a value of either true or false.
Example in Swift:
let isLoggedIn = true

Question 2

What does the ‘equal to’ (==) operator do?

Answer 2

The ‘equal to’ operator checks if two values are equal, returning true if they are equal and false if they are not.
Example in Swift:
let isEqual = (5 == 5) // true

Question 3

What does the ‘greater than’ (>) operator do?

Answer 3

The ‘greater than’ operator checks if the value on the left is greater than the value on the right.
Example in Swift:
let isGreater = (10 > 5) // true

Question 4

What does the ‘less than’ (<) operator do?

Answer 4

The ‘less than’ operator checks if the value on the left is less than the value on the right.
Example in Swift:
let isLess = (3 < 5) // true

Question 5

What does the ‘greater than or equal to’ (>=) operator do?

Answer 5

The ‘greater than or equal to’ operator checks if the value on the left is greater than or equal to the value on the right.
Example in Swift:
let isGreaterOrEqual = (5 >= 5) // true

Question 6

What does the ‘less than or equal to’ (<=) operator do?

Answer 6

The ‘less than or equal to’ operator checks if the value on the left is less than or equal to the value on the right.
Example in Swift:
let isLessOrEqual = (5 <= 10) // true

Question 7

What does the ‘not equal to’ (!=) operator do?

Answer 7

The ‘not equal to’ operator checks if two values are not equal, returning true if they are not.
Example in Swift:
let isNotEqual = (5 != 3) // true

Question 8

What is the logical AND (&&) operator?

Answer 8

The logical AND operator returns true if both conditions are true.
Example in Swift:
let result = (5 > 3 && 10 > 7) // true

Question 9

What is the logical OR (||) operator?

Answer 9

The logical OR operator returns true if at least one condition is true.
Example in Swift:
let result = (5 > 3 || 3 > 10) // true

Question 10

What is the NOT (!) operator?

Answer 10

The NOT operator inverts the Boolean value, returning true if it was false, and false if it was true.
Example in Swift:
let isFalse = !(5 == 5) // false

Question 11

What is the Exclusive OR (XOR) operator?

Answer 11

The Exclusive OR (XOR) operator returns true if exactly one of the conditions is true, but false if both are true or both are false.
Example in Swift:
let result = (true ^ false) // true

Question 12

What is encryption?

Answer 12

Encryption is the process of converting information into scrambled code to protect it from unauthorized access.
Example:
When paying online, encryption secures your payment details.

Question 13

What is an if statement in Swift?

Answer 13

An if statement checks a condition and executes a block of code if the condition is true.
Example in Swift:
let isRaining = true
if isRaining {
print(“Bring an umbrella!”)
}

Question 14

What is an else statement in Swift?

Answer 14

An else statement runs a block of code if the condition in the if statement is false.
Example in Swift:
let isRaining = false
if isRaining {
print(“Bring an umbrella!”)
} else {
print(“No need for an umbrella!”)
}

Question 15

What is an else-if statement in Swift?

Answer 15

An else-if statement is used to check additional conditions after the initial if condition.
Example in Swift:
let position = 2
if position == 1 {
print(“You came first!”)
} else if position == 2 {
print(“You came second!”)
} else {
print(“You did not finish in the top two.”)
}

Question 16

How are Booleans used in conditional statements?

Answer 16

Booleans evaluate to either true or false and are used to determine if a condition is met.
Example in Swift:
let coldOutside = true
if coldOutside {
print(“Put on a warm coat.”)
}

Question 17

How does the logical AND (&&) operator work in Swift?

Answer 17

The AND (&&) operator returns true if both sides of the condition are true.
Example in Swift:
let temp = 70
if temp >= 68 && temp <= 72 {
print(“The temperature is just right!”)
} else {
print(“The temperature is too hot or too cold.”)
}

Question 18

How does the logical OR (||) operator work in Swift?

Answer 18

The OR (||) operator returns true if at least one side of the condition is true.
Example in Swift:
let mainsPower = false
let batteryPower = true
if mainsPower || batteryPower {
print(“I can use my phone!”)
} else {
print(“Better find a charger.”)
}