Logical Operators Part 2

Part of the Fundamentals section of Coddy's Swift journey — lesson 22 of 86.

The AND operator (&&) combines two conditions and returns true only when both conditions are true. If either condition is false, the entire expression evaluates to false.

let age = 25
let hasLicense = true

let canDrive = age >= 18 && hasLicense  // true
print(canDrive)

In this example, both conditions must be met: the person must be at least 18 years old AND have a license. Since both are true, canDrive is true. If either condition were false, the result would be false.

let temperature = 30
let isSunny = false

let perfectBeachDay = temperature > 25 && isSunny  // false

Here, even though the temperature is above 25, it's not sunny — so perfectBeachDay is false. The AND operator is essential when you need multiple requirements to be satisfied simultaneously, like checking if a user has both a valid username and password, or if a product is both in stock and within budget.

Challenge

Easy

Write a function canEnterClub that takes age and hasMembership and returns whether a person can enter the club.

A person can enter the club only if they are at least 21 years old AND have a membership. Both conditions must be true.

Parameters:

age (Int): The person's age
hasMembership (Bool): Whether the person has a club membership

Returns: true if the person meets both requirements, false otherwise (Bool)

Cheat sheet

The AND operator (&&) combines two conditions and returns true only when both conditions are true. If either condition is false, the entire expression evaluates to false.

let age = 25
let hasLicense = true

let canDrive = age >= 18 && hasLicense  // true

Both conditions must be met for the result to be true. If either condition is false, the entire expression is false:

let temperature = 30
let isSunny = false

let perfectBeachDay = temperature > 25 && isSunny  // false

Try it yourself

func canEnterClub(age: Int, hasMembership: Bool) -> Bool {
    // Write code here
}

Test yourself

This lesson includes a short quiz. Start the lesson to answer it and track your progress.

All lessons in Fundamentals

1Introduction

The Language Hello World!Comments

4Operators Part 1

Arithmetic Operators Modulo Operator Compound Assignment Recap - Simple Math Comparison Operators

7Basic IO

Print Function String Interpolation ReadLine Input Type Conversion Recap - Till 120 Recap - True or False

10Functions

Declare A Function Parameters And Arguments Return Values Argument Labels Recap - Sigma Function Recap - Validation Function Default Values

13Iterating Over Sequences

Iterating Over Elements The Enumerated Method Iterating Over Strings P1 Iterating Over Strings P2

16Final Challenges

Flat Asterisk Pyramid Pattern Finder What To Buy

2Variables

Let vs Var Type Annotations Numbers String Boolean Naming Conventions Recap - Initialize Variables

5Operators Part 2

Logical Operators Part 1Logical Operators Part 2Recap - Simple Logic Logical Operators Part 3 Ternary Operator

8Bill Split Calculator

Welcome Message Getting Input

Calculating Tip And Total

Splitting The Bill

Formatted Output

11FizzBuzz with a Twist

Game Overview The FizzBuzz Function

Looping The Numbers

Adding The Twist

14Arrays Advanced

Array Slicing Part 1 Array Slicing Part 2 Sequence Operators The Contains Method