# Author: Nathan Mathews-Mallia
# Student ID: 220225401
# Programming Task 1 - Air Quality Calculator
# This program will report the Air Quality based upon user inputs. 

# Determine the number of readings that user requires. 
while True:
    try:
        readings=int(input("Enter number of readings: "))
        if readings > 0:
           break
        if readings <= 0:
           print("Please enter a positive integer") 
    except ValueError:
            print("Please enter a number, not text")            

# Run while loop based upon readings requires. 
while readings > 0:
    while True:
        try: 
            ozone=float(input("Amount of Ozone recorded (parts per hundred million): "))
            if ozone > 0:
               break
            if ozone <= 0:
               print("Please enter a nonnegative number") 
        except ValueError:
                print("Please enter a number, not text")
        
    while True:
        try:
            sulfur=float(input("Amount of Sulfur Dioxide recorded (parts per hundred million): "))
            if sulfur > 0:
                break
            if sulfur <= 0:
                print("Please enter a nonnegative number") 
        except ValueError:
                print("Please enter a number, not text")

    while True:
        try: 
            particles=float(input("Amount of Particles less than 2.5 micrometers diameter recorded (micrograms per cubic meter): "))
            if particles > 0:
                break
            if particles <= 0:
                print("Please enter a nonnegative number") 
        except ValueError:
                print("Please enter a number, not text")

# Initialise a list and input Pollutant values. Report the highest AQI number. 
    lst = []
    OzonePollutant = 100*(ozone/8)
    SulfurPollutant = 100*(sulfur/20)
    ParticlesPollutant = 100*(particles/25)
    lst.append(OzonePollutant)
    lst.append(SulfurPollutant)
    lst.append(ParticlesPollutant)
    print("AQI:", max(lst))

# Deduct 1 from readings variable to ensure loop ends.    
    readings = readings - 1

Author: Nathan Mathews-Mallia
Student ID: 220225401
Programming Task 1 - Air Quality Calculator
This program will report the Air Quality based upon user inputs. 

How to run:
Double click the air_quality.py file. 
Inpui the number of readings you would like to conduct. 
Make sure you use a positive value float number.