66            print("\nThe conversion result of PM2.5 particle concentration: ")
67            print("- AQI: {}".format(aqi))
68        elif choice == "2":
69            pm10_concentration = float(input("\nEnter the PM10 particle concentration value (in µg/m³): "))70            aqi = calc_aqi_us(pm10_concentration, 'PM10')
71            print("\nThe conversion result of PM10 particle concentration: ")
72            print("- AQI: {}".format(aqi))

61        choice = input("\nOption: ")
62
63        if choice == "1":
64            pm25_concentration = float(input("\nEnter the PM2.5 particle concentration value (in µg/m³): "))65            aqi = calc_aqi_us(pm25_concentration, 'PM2.5')
66            print("\nThe conversion result of PM2.5 particle concentration: ")
67            print("- AQI: {}".format(aqi))

47    while concentration > c_high[i_low]:
48        i_low += 1
49    i_high = i_low
50    aqi = round(((aqi_high[i_high] - aqi_low[i_low]) / (c_high[i_high] - c_low[i_low])) * (concentration - c_low[i_low]) + aqi_low[i_low])51    return aqi
52
53#Function to prompt user for input and calculate PM2.5 and PM10 concentrations and AQI.

20            aqi = ((i_high[i] - i_low[i]) / (c_high[i] - item)) * (c - item) + i_low[i]
21            return round(aqi, 1)
22    if c > c_high[-1]:
23        aqi = ((i_high[-1] - i_low[-1]) / (c_high[-1] - c_low[-1])) * (c - c_low[-1]) + i_low[-1]24        return round(aqi, 1)
25    else:
26        return 'Input concentration is below AQI scale'