Logical patterns (and, or, not) in C Sharp (C#) - Mini Project: Build & Apply

Logical patterns (and, not) in C#

📖 Scenario: You are building a simple security system that checks if a person can enter a building based on their ID badge and time of entry.

🎯 Goal: Create a program that uses logical patterns and and not to decide if entry is allowed.

📋 What You'll Learn

Create a boolean variable hasIDBadge with value true or false

Create an integer variable entryHour representing the hour of entry (0 to 23)

Create a boolean variable isWeekend to indicate if it is weekend

Use logical operators && (and) and ! (not) to check entry conditions

Print "Entry allowed" if conditions are met, otherwise print "Entry denied"

💡 Why This Matters

🌍 Real World

Security systems often check multiple conditions like ID badges and time to allow or deny access.

💼 Career

Understanding logical operators is essential for writing conditions in software development, especially in security, validation, and decision-making code.

1

Create initial variables

Create a boolean variable hasIDBadge and set it to true. Create an integer variable entryHour and set it to 14.

C Sharp (C#)

// Your code here

Need a hint?

Use bool for true/false and int for numbers.

2

Add weekend variable

Add a boolean variable isWeekend and set it to false.

C Sharp (C#)

bool hasIDBadge = true;
int entryHour = 14;
// Your code here

Need a hint?

Weekend means no workday, so set isWeekend to false for now.

3

Write entry condition using logical operators

Write an if statement that checks if hasIDBadge is true and entryHour is between 9 and 17 inclusive and it is not weekend (isWeekend is false). Use && for and and ! for not.

C Sharp (C#)

bool hasIDBadge = true;
int entryHour = 14;
bool isWeekend = false;

// Your code here

Need a hint?

Use if (hasIDBadge && entryHour >= 9 && entryHour <= 17 && !isWeekend) to check all conditions.

4

Print the result

Inside the if block, write Console.WriteLine("Entry allowed"). Inside the else block, write Console.WriteLine("Entry denied").

C Sharp (C#)

bool hasIDBadge = true;
int entryHour = 14;
bool isWeekend = false;

if (hasIDBadge && entryHour >= 9 && entryHour <= 17 && !isWeekend)
{
    // Your code here
}
else
{
    // Your code here
}

Need a hint?

Use Console.WriteLine to show the message on screen.