3.7 Mastering Nested Conditionals - Unlocking Advanced Decision-Making in Programming

IF exam_score >= 60
{
    IF attendance >= 75
    {
        DISPLAY "Pass"
    }
    ELSE
    {
        DISPLAY "Fail due to low attendance"
    }
}
ELSE
{
    DISPLAY "Fail due to low exam score"
}

## Python Segment

# Ask the user for input values
weight = float(input("Enter the weight of the package in pounds: "))
delivery_days = int(input("Enter the delivery speed (number of delivery days): "))

# Determine if the delivery is under 3 days or not
is_express = delivery_days < 3

# Nested conditionals to calculate shipping cost
if is_express:  # More expensive if under 3 days
    if weight <= 5:
        print("Shipping cost is $15")
    else:
        print("Shipping cost is $25")
else:  # Less expensive if 3 days or more
    if weight <= 5:
        print("Shipping cost is $5")
    else:
        print("Shipping cost is $10")

## Another Example 

# Ask the user for input values
age = int(input("Enter your age: "))
is_student = input("Are you a student? (yes or no): ")

# Determine if the user is a student
student_discount = (is_student == 'yes' or is_student == 'Yes' or is_student == 'YES')

# Nested conditionals to calculate ticket price
if age < 12:  # Child ticket
    ticket_price = 8  # Base price for children
elif age >= 12 and age <= 64:  # Adult ticket
    ticket_price = 12  # Base price for adults
else:  # Senior ticket
    ticket_price = 10  # Base price for seniors

# Apply student discount if applicable
if student_discount:
    ticket_price *= 0.8  # 20% discount

print(f"The ticket price is: ${ticket_price:.2f}")

# Example program to classify the type of triangle based on the lengths of its sides

# Step 1: Get input for the three sides of the triangle
side1 = float(input("Enter the length of side 1: "))
side2 = float(input("Enter the length of side 2: "))
side3 = float(input("Enter the length of side 3: "))

# Step 2: Check if the entered sides can form a valid triangle
if (side1 + side2 > side3) and (side1 + side3 > side2) and (side2 + side3 > side1):
    # Step 3: Use nested conditionals to determine the type of triangle
    if side1 == side2 == side3:
        print("This is an Equilateral Triangle.")
    elif side1 == side2 or side1 == side3 or side2 == side3:
        print("This is an Isosceles Triangle.")
    else:
        print("This is a Scalene Triangle.")
else:
    # If it's not a valid triangle
    print("The entered sides do not form a valid triangle.")