Activity 3 Operators

1. Arithmetic Operations

A. Area of a rectangle

Solution:

$length = 4;
$width = 6;
$area = $length * $width;
echo "Area of a rectangle: " . $area;

Output:
Area of a rectangle: 24

B. Currency converter

Solution:

$amount = 20; 

$conversion_rate = 56.21;
$converted_amount = $amount * $conversion_rate;
echo "Converted currency = " . $converted_amount;

Output:
Equivalent in USD: 1124.2

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2. Assignment Operators

A. Track the progress of a fundraising campaign

Solution:

$total_donation = 0; 

$new_donation = 200;
$total_donation += $new_donation;
echo "Track fundraising: " . $total_donation; 

Output:
Track fundraising: 200

B. Voting system

Solution:

$candidate1_votes = 5;
$user_vote = 1;
candidate1_votes += $user_vote;
echo "Candidate 1 total votes: " . $candidate_votes;

Output:
Candidate 1 total votes: 6

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3. Comparison Operators

A. Compare two athletes performance

Solution:

$athlete1 = 11.34;
$athlete2 = 10.87;
$winner = ($athlete1 < $athlete2) ? "Athlete 1": "Athlete 2";
echo "Winner: ". $winner;

Output:
Winner: Athlete 2

B. Algorithm efficiency

Solution:

$algo1 = 2.5;
$algo2 = 1.6;
$faster = ($algo1 < $algo2) ? "Algorithm 1" : "Algorithm 2";
echo "More efficient algorithm: " . $faster; 

Output:
More efficient algorithm: Algorithm 2

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4. Increment/Decrement Operations

A. Factorial number

Solution:

$num = 4;
$result = $num;
for ($i = $num - 1; $i > 0; $i--) { 
    $result *= $i;
}
echo "Factorial of $num: $result"; 

Output:
Factorial of 4: 24

B. Vehicle movement

Solution:

$positionNow = 0;
$distanceTravelled = 23;
$positionNow += $distanceTravelled;
echo "Final position: " . $positionNow; 

Output:
Final position: 23

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5. Logical Operators

A. Discount elgibility

Solution:

$purchaseAmount = 800; 
$customerLoyalty = true;
$discountEligibility = ($purchaseAmount > 500 && $customerLoyalty) ? "Eligible" : "Not Eligible"; 
echo "Discount eligibility: " . $discountEligibility; 

Output
Discount eligibility: Eligible

B. Chatbot

Solution:

$userInput = "year";
$chatbotAns = ($userInput == "year") ? "It is 2024" : "I dont know that";
echo "Chatbot: " . $chatbotAns; 

Output:
Chatbot: It is 2024