Exercise Solutions: Booleans and Conditionals

  1. Assign the following variables for our space shuttle.

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    engine_indicator_light = "red blinking"
space_suits_on = True
shuttle_cabin_ready = True
crew_status = space_suits_on and shuttle_cabin_ready
computer_status_code = 200
shuttle_speed = 15000

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  1. Write conditional expressions to satisfy the safety rules.

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      if crew_status:
   print("Crew Ready")
else:
   print("Crew Not Ready")

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      if computer_status_code == 200:
   print("Please stand by. Computer is rebooting.")
elif computer_status_code == 400:
   print("Success! Computer online.")
else:
   print("ALERT: Computer offline!")

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      if shuttle_speed > 17500:
   print("ALERT: Escape velocity reached!")
elif shuttle_speed < 8000:
   print("ALERT: Cannot maintain orbit!")
else:
   print("Stable speed.")

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  1. Monitor the shuttle’s fuel status.

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    if fuel_level < 1000 or engine_temperature > 3500 or engine_indicator_light == "red blinking":
   print("ENGINE FAILURE IMMINENT!")
elif fuel_level <= 5000 or engine_temperature > 2500:
   print("Check fuel level. Engines running hot.")
elif fuel_level > 20000 and engine_temperature <= 2500:
   print("Full tank. Engines good.")
elif fuel_level > 10000 and engine_temperature <= 2500:
   print("Fuel level above 50%. Engines good.")
elif fuel_level > 5000 and engine_temperature <= 2500:
   print("Fuel level above 25%. Engines good.")
else:
   print("Fuel and engine status pending...")

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