我在学习如何使用 STR、INT 和 ELIF 时遇到问题

Question

age = str(input("how old are you?"))
if age >= 18:
  print("have a beer")
elif age == 17:
  print("have a car")
elif age == 16: 
  print("have a book")
else: print("go away")
 

the error that pops up says Typeerror: '>=' not supported between instances of 'str't 'int' i am starting this for school and i am confused, my teacher just left us and i dont know what to do. do i change the >= to a > or do i change the str to and int?

Answer 1

Convert to int (or to numeric type in general) in order to do numeric comparisons later, such as >= :

age = int(input("how old are you?"))

Answer 2

What it means is that you're trying to compare a string with a number in a way that is not valid >= .

str converts the input to a string.

int converts the input, where possible, to an integer.

So, yes, please , change str to int .

Answer 3

Note

age = str(input("how old are you?"))

that this is redundant, as input itself returns string

If the prompt argument is present, it is written to standard output without a trailing newline. The function then reads a line from input, converts it to a string (stripping a trailing newline), and returns that.

ie this give same effect as writing

age = input("how old are you?")