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  1. print("Lets calculate your BMI!\n")
  2.  
  3. valid_region = False
  4. while valid_region == False:
  5.     #prompts for user's region/race 
  6.     user_region = input("Enter ‘1’ for US/Europe or ‘2’ for Asian as the \
  7. selected region/race. Please enter the numeric value only without any leading \
  8. or trailing spaces.: ")
  9.     if user_region == '1' or user_region == '2':
  10.         valid_region = True
  11.         #prompts for user's preferred system of measurement
  12.         valid_system = False
  13.         while valid_system == False:
  14.             preferred_system = input("\nEnter ‘1’ for Metric (i.e. kg & m) or \
  15. ‘2’ for Imperial (i.e. lbs & inches) as the preferred measurement system. \
  16. Please enter the numeric value only without any leading or trailing spaces.: ")
  17.             if preferred_system == '1' or preferred_system == '2':
  18.                 valid_system = True
  19.                 #if Metric is chosen
  20.                 if preferred_system == '1':
  21.                     valid_weight = False
  22.                     while valid_weight == False:
  23.                         #prompts for Metric weight in kilograms 
  24.                         user_weight = input("\nEnter your weight in kilograms \
  25. (kg). Please enter a numeric value only. Decimals are allowed. Do not \
  26. include any leading or trailing spaces. (e.g. '53.5'): ")
  27.                         try:
  28.                             weight_float = float(user_weight)
  29.                             if weight_float > 0:
  30.                                 valid_weight = True
  31.                                 valid_height = False
  32.                                 while valid_height == False:
  33.                                     #prompts for Metric height in meters
  34.                                     user_height = input("\nEnter your height \
  35. in meters (m). Please enter a numeric value only. Decimals are allowed. Do \
  36. not include any leading or trailing spaces. (e.g. '1.7'): ")
  37.                                     try:
  38.                                         height_float = float(user_height)
  39.                                         if height_float > 0:
  40.                                             valid_height = True
  41.                                             #calculate BMI using Metric formula
  42.                                             metric_bmi = weight_float / \
  43.                                                 (height_float ** 2)
  44.                                             if user_region == '1':
  45.                                                 if metric_bmi < 18.5:
  46.                                                     category = "underweight"
  47.                                                 elif 18.5 <= metric_bmi < 25:
  48.                                                     category = "normal"
  49.                                                 elif 25 <= metric_bmi < 30:
  50.                                                     category = "overweight"
  51.                                                 else:    
  52.                                                     category = "obese"
  53.                                             elif user_region == '2':
  54.                                                 if metric_bmi < 18.5:
  55.                                                     category = "underweight"
  56.                                                 elif 18.5 <= metric_bmi < 23:
  57.                                                     category = "normal"
  58.                                                 elif 23 <= metric_bmi < 25:
  59.                                                     category = "overweight"
  60.                                                 else:
  61.                                                     category = "obese"
  62.                                             print("\nYour calculated BMI is \
  63. {:.2f} kg/m^2. Based on the result, you are categorized as \
  64. '{}'.".format(metric_bmi, category)) 
  65.                                     except ValueError:
  66.                                         print("\nInvalid input for height. \
  67. Please try again!\n")
  68.                         except ValueError:
  69.                             print("\nInvalid input for weight. Please try \
  70. again!\n")
  71.                 #if Imperial is chosen
  72.                 if preferred_system == '2':
  73.                     valid_weight = False
  74.                     while valid_weight == False:
  75.                         #prompts for Imperial weight in pounds
  76.                         user_weight = input("\nEnter your weight in pounds \
  77. (lbs). Please enter a numeric value only. Decimals are allowed. Do not \
  78. include any leading or trailing spaces. (e.g. '118'): ")
  79.                         try: 
  80.                             weight_float = float(user_weight)
  81.                             if weight_float > 0:
  82.                                 valid_weight = True
  83.                                 valid_height = False
  84.                                 while valid_height == False:
  85.                                     #prompts for Imperial height in inches
  86.                                     user_height = input("\nEnter your height \
  87. in inches (in). Please enter a numeric value only. Decimals are allowed. Do \
  88. not include any leading or trailing spaces. (e.g. '67'): ")
  89.                                     try:
  90.                                         height_float = float(user_height)
  91.                                         if height_float > 0:
  92.                                             valid_height = True
  93.                                             #calculate BMI - Imperial formula
  94.                                             imperial_bmi = \
  95.                                                 (weight_float * 703) / \
  96.                                                 (height_float ** 2)
  97.                                             #convert weight & height to Metric
  98.                                             weight_kg = weight_float * 0.453592
  99.                                             height_m = height_float * 0.0254
  100.                                             #calculate BMI - Metric formula 
  101.                                             metric_bmi = weight_kg / \
  102.                                                 (height_m ** 2)
  103.                                             if user_region == '1':
  104.                                                 if metric_bmi < 18.5:
  105.                                                     category = "underweight"
  106.                                                 elif 18.5 <= metric_bmi < 25:
  107.                                                     category = "normal"
  108.                                                 elif 25 <= metric_bmi < 30:
  109.                                                     category = "overweight"
  110.                                                 else:    
  111.                                                     category = "obese"
  112.                                             elif user_region == '2':
  113.                                                 if metric_bmi < 18.5:
  114.                                                     category = "underweight"
  115.                                                 elif 18.5 <= metric_bmi < 23:
  116.                                                     category = "normal"
  117.                                                 elif 23 <= metric_bmi < 25:
  118.                                                     category = "overweight"
  119.                                                 else:
  120.                                                     category = "obese"
  121.                                             print("\nYour calculated BMI is \
  122. {:.2f} lb/in^2. Based on the result, you are categorized as \
  123. '{}'.".format(imperial_bmi, category)) 
  124.                                     except ValueError:
  125.                                         print("\nInvalid input for height. \
  126. Please try again!\n")
  127.                         except ValueError:
  128.                             print("\nInvalid input for weight. Please try \
  129. again!\n") 
  130.             else:
  131.                 print("\nInvalid input for preferred system of measurement. \
  132. Please try again!\n") 
  133.     else:
  134.       print("\nInvalid input for region/race. Please try again!\n")
Success #stdin #stdout 0.04s 9868KB
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Lets calculate your BMI!

Enter ‘1’ for US/Europe or ‘2’ for Asian as the selected region/race. Please enter the numeric value only without any leading or trailing spaces.: 
Enter ‘1’ for Metric (i.e. kg & m) or ‘2’ for Imperial (i.e. lbs & inches) as the preferred measurement system. Please enter the numeric value only without any leading or trailing spaces.: 
Enter your weight in pounds (lbs). Please enter a numeric value only. Decimals are allowed. Do not include any leading or trailing spaces. (e.g. '118'): 
Enter your height in inches (in). Please enter a numeric value only. Decimals are allowed. Do not include any leading or trailing spaces. (e.g. '67'): 
Your calculated BMI is 18.48 lb/in^2. Based on the result, you are categorized as 'underweight'.
https://ideone.com/EJS7j1
language:
Python 3 (python  3.9.5)
created:
9 days ago
visibility:
public

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