Bmi 计算器 if 语句在 python 中不起作用

Question

I am stuck writing a program to calculate bmi and categorizing them.

individuals = list()
for i in range(6):
    user = str(input("Please enter the names of the 6 users who want to calculate their BMI: "))
    individuals.append(user)
BMIs = []
for user in individuals:
    print("Calculating for", user)
    height = int(input(user + ", in inches, how tall are you? "))
    weight = int(input(user + ", in pounds, how much do you weight? "))
    BMIs.append(user  + ", your BMI is: " + str(weight * 703/height**2))

for BMI in BMIs:
    print(BMI)
    
if  int(BMI)< 16:
   print( user + "BMI is:" + str(bmi) + "and you are:severely underweight")

elif int(BMI)>= 16 and bmi < 18.5:
   print( user + "BMI is:" + str(bmi) + "and you are:severely underweight")

elif int(BMI) >= 18.5 and bmi < 25:
   print( user + "BMI is:" + str(bmi) + "and you are:severely Healthy")

elif int(BMI)>= 25 and bmi < 30:
   print( user + "BMI is:" + str(bmi) + "and you are:severely overweight")

elif int(BMI) >=30:
   print( user +" " + "BMI is:" + str(bmi) + "and you are:severely overweight")

the if statements dont work and i cant figure how to categorize those who are overweight, healthy

Answer 1

Had to make quite a few changes to make this work:

individuals = list()
for i in range(6):
    user = str(input("Please enter the names of the 6 users who want to calculate their BMI: "))
    individuals.append(user)
BMIs = []
messages = []
for user in individuals:
    print("Calculating for", user)
    height = int(input(user + ", in inches, how tall are you? "))
    weight = int(input(user + ", in pounds, how much do you weight? "))
    BMIs.append(weight * 703 / height ** 2)
    messages.append(user + ", your BMI is: " + str(BMIs[-1]))

for m in messages:
    print(m)

for u in zip(individuals, BMIs):
    if u[1] < 16:
        print(u[0] + "BMI is:" + str(u[1]) + " and you are:severely underweight")
    elif 16 <= u[1] < 18.5:
        print(u[0] + "BMI is:" + str(u[1]) + " and you are:severely underweight")
    elif 18.5 <= u[1] < 25:
        print(u[0] + "BMI is:" + str(u[1]) + " and you are:severely Healthy")
    elif 25 <= u[1] < 30:
        print(u[0] + "BMI is:" + str(u[1]) + " and you are:severely overweight")
    elif u[1] >= 30:
        print(u[0] + " " + "BMI is:" + str(u[1]) + " and you are:severely overweight")