不受支持的操作數類型（個），/： 'STR' 和 'STR'

Question

print("Please enter your Weight") 
weight = input(">") 
print("Please enter your height") 
height = input(">") 
bmi = weight/height 
if int(bmi) <= 18: 
print("you are currently under weight") 
elif int(bmi)>=24: 
print("you are normal weight") 
else: 
print("you are over weight") 

回溯

File "C:\Users\reazonsraj\Desktop\123.py", line 6, in <module> 
bmi = weight/height 
TypeError: unsupported operand type(s) for /: 'str' and 'str' 

Answer 1

當輸入它保存爲一個字符串數據。你需要做的是將其轉換爲int。

print("Please enter your Weight") 
weight = int(input(">")) 
print("Please enter your height") 
height = int(input(">")) 
bmi = weight/height 
if int(bmi) <= 18: 
print("you are currently under weight") 
elif int(bmi)>=24: 
print("you are normal weight") 
else: 
print("you are over weight") 

這將解決一個問題，但它不能解決所有問題。如果您要輸入十進制數，那麼您將收到ValueError，因爲int()涉及整數。要解決此問題，您將需要使用float()而不是int。

print("Please enter your Weight") 
weight = float(input(">")) 
print("Please enter your height") 
height = float(input(">")) 
bmi = weight/height 

Answer 2

def enter_params(name): 
    print("Please enter your {}".format(name)) 
    try: 
     return int(input(">")) 
    except ValueError: 
     raise TypeError("Enter valid {}".format(name)) 
height = enter_params('height') 
weight = enter_params('weight') 
bmi = int(weight/height) 
if bmi <= 18: 
    print("you are currently under weight") 
elif bmi >= 24: 
    print("you are normal weight") 
else: 
    print("you are over weight") 

Answer 3

print("Please enter your Weight") 
weight = float(input()) 
print("Please enter your height") 
height = float(input()) 
bmi = weight/height 
if (bmi) <= 18: 
print("you are currently under weight") 
elif (bmi)>=24: 
print("you are normal weight") 
else: 
print("you are over weight")