Altitude limits configuration in Drone Programming - Mini Project: Build & Apply

Altitude Limits Configuration

📖 Scenario: You are programming a drone to fly safely within certain altitude limits. The drone must not fly below the minimum altitude or above the maximum altitude to avoid obstacles and legal restrictions.

🎯 Goal: Build a program that sets altitude limits, checks if a given altitude is within those limits, and prints whether the altitude is safe or not.

📋 What You'll Learn

Create a dictionary called altitude_limits with keys 'min' and 'max' and values 100 and 500 respectively.

Create a variable called current_altitude and set it to 350.

Write an if statement that checks if current_altitude is between altitude_limits['min'] and altitude_limits['max'] inclusive.

Print "Altitude is within safe limits." if the altitude is safe, otherwise print "Altitude is out of safe limits!".

💡 Why This Matters

🌍 Real World

Drones must fly within safe altitude limits to avoid collisions and comply with regulations.

💼 Career

Understanding how to configure and check limits is important for drone software developers and engineers working on autonomous flying devices.

1

Set altitude limits

Create a dictionary called altitude_limits with keys 'min' and 'max' and values 100 and 500 respectively.

Drone Programming

# Create the altitude_limits dictionary with 'min' as 100 and 'max' as 500
# Your code here

Hint

Use curly braces {} to create a dictionary with keys and values.

2

Set current altitude

Create a variable called current_altitude and set it to 350.

Drone Programming

altitude_limits = {'min': 100, 'max': 500}
# Create the current_altitude variable and set it to 350
# Your code here

Hint

Use a simple assignment to create the variable.

3

Check altitude limits

Write an if statement that checks if current_altitude is between altitude_limits['min'] and altitude_limits['max'] inclusive.

Drone Programming

altitude_limits = {'min': 100, 'max': 500}
current_altitude = 350
# Write an if statement to check if current_altitude is between altitude_limits['min'] and altitude_limits['max'] inclusive
# Your code here

Hint

Use chained comparison operators to check the range.

4

Print safety status

Print "Altitude is within safe limits." if the altitude is safe, otherwise print "Altitude is out of safe limits!".

Drone Programming

altitude_limits = {'min': 100, 'max': 500}
current_altitude = 350
if altitude_limits['min'] <= current_altitude <= altitude_limits['max']:
    safe = True
else:
    safe = False
# Print the safety status message
# Your code here

Hint

Use a print statement inside an if-else to show the message.

Practice

1. What is the main purpose of using setAltitudeLimits(min, max) in drone programming?

easy

A. To control the drone's speed

B. To set the minimum and maximum altitude the drone can fly

C. To change the drone's camera angle

D. To start the drone's engine

Solution

1. Step 1: Understand the function name and parameters

   The function setAltitudeLimits(min, max) clearly suggests setting limits related to altitude using minimum and maximum values.

2. Step 2: Match the function purpose with options

   Among the options, only setting altitude boundaries matches the function's name and parameters.

3. Final Answer:

   To set the minimum and maximum altitude the drone can fly -> Option B

4. Quick Check:

   Altitude limits = min and max altitude [OK]

Hint: Look for min and max altitude in the function name [OK]

Common Mistakes:

• Confusing altitude limits with speed control
• Thinking it controls camera or engine
• Ignoring parameter names min and max

2. Which of the following is the correct syntax to set altitude limits from 10 to 100 meters?

easy

A. setAltitudeLimits(10, 100);

B. setAltitudeLimits[10, 100];

C. setAltitudeLimits{10, 100};

D. setAltitudeLimits 10, 100;

Solution

1. Step 1: Identify correct function call syntax

   Function calls use parentheses () with arguments separated by commas.

2. Step 2: Check each option's syntax

   setAltitudeLimits(10, 100); uses parentheses and commas correctly. Options B and C use brackets or braces which are invalid for function calls. setAltitudeLimits 10, 100; misses parentheses.

3. Final Answer:

   setAltitudeLimits(10, 100); -> Option A

4. Quick Check:

   Function call syntax = parentheses ( ) [OK]

Hint: Function calls always use parentheses ( ) [OK]

Common Mistakes:

• Using square brackets or braces instead of parentheses
• Omitting parentheses around arguments
• Missing commas between arguments

3. What will be the output of this code snippet?

setAltitudeLimits(50, 200);
print(getAltitudeLimits());

Assuming getAltitudeLimits() returns the current limits as a list [min, max].

medium

A. Error: function not defined

B. [200, 50]

C. [50, 200]

D. [0, 0]

Solution

1. Step 1: Understand the function calls

   setAltitudeLimits(50, 200) sets the limits to minimum 50 and maximum 200. getAltitudeLimits() returns the current limits as a list [min, max].

2. Step 2: Predict the output of print statement

   Since limits were set to 50 and 200, the output will be [50, 200].

3. Final Answer:

   [50, 200] -> Option C

4. Quick Check:

   Set then get limits = [50, 200] [OK]

Hint: Set limits first, then get returns same values [OK]

Common Mistakes:

• Swapping min and max values in output
• Assuming default limits without setting
• Thinking function returns error

4. Identify the error in this code snippet:

setAltitudeLimits(150, 100);
print(getAltitudeLimits());

Assuming setAltitudeLimits(min, max) requires min < max.

medium

A. Minimum altitude is greater than maximum altitude

B. Missing semicolon after setAltitudeLimits

C. getAltitudeLimits() is not defined

D. No error, code runs fine

Solution

1. Step 1: Check the order of min and max values

   The code calls setAltitudeLimits(150, 100) where min=150 and max=100, which violates the rule min < max.

2. Step 2: Identify the error caused by invalid limits

   Since min is greater than max, this is an error in setting altitude limits.

3. Final Answer:

   Minimum altitude is greater than maximum altitude -> Option A

4. Quick Check:

   min < max required, here min=150 > max=100 [OK]

Hint: Min altitude must be less than max altitude [OK]

Common Mistakes:

• Ignoring min < max rule
• Thinking semicolon is mandatory in all languages
• Assuming getAltitudeLimits() is undefined

5. You want to configure altitude limits so the drone flies only between 20 and 120 meters. Which code snippet correctly applies this and prevents invalid input?

hard

A. setAltitudeLimits(120, 20);

B. setAltitudeLimits(max, min); // with min=20, max=120

C. if (min > max) { setAltitudeLimits(min, max); }

D. if (min < max) { setAltitudeLimits(min, max); } else { print('Invalid limits'); } // with min=20, max=120

Solution

1. Step 1: Check condition to validate inputs

   We must ensure min is less than max before setting limits to avoid errors.

2. Step 2: Analyze each option's logic

   if (min < max) { setAltitudeLimits(min, max); } else { print('Invalid limits'); } // with min=20, max=120 checks if min < max and sets limits only if true, else prints error. Options A and B swap min and max incorrectly. if (min > max) { setAltitudeLimits(min, max); } uses wrong condition min > max.

3. Final Answer:

   if (min < max) { setAltitudeLimits(min, max); } else { print('Invalid limits'); } // with min=20, max=120 -> Option D

4. Quick Check:

   Validate min < max before setting limits [OK]

Hint: Always check min < max before setting limits [OK]

Common Mistakes:

• Swapping min and max values
• Using wrong condition for validation
• Not handling invalid input cases