TypeError unsupported operand type s for - str and str

Question

Hi. I am new to Python and I am practicing to code. But I am facing some issues.

>>> a=input('>')
>3

>>> b=input('>')
>5

>>> print(b-a)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: unsupported operand type(s) for -: 'str' and 'str'
>>>

Please help me solve this error

Comments

Please declare the data type to your variable like int or float else python by default takes as string

Answer 1

Hi. This error is caused because you are trying to do a subtraction between two strings. When you take the input, the input data is stored as a string by default. To apply subtraction, you can change the data type into int(or float)

print(int(b)-int(a))

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Comments

thank you, i had the same concern and you helped me ;)

Answer 2

By turning them into integers instead:

percent = (int(pyc) / int(tpy)) * 100;

In python 3, the input() function returns a string. Always. This is a change from Python 2; the raw_input() function was renamed to input().

Answer 3

& is "bitwise and" operand in Python, you should use and instead

from wiki.python.org:

x & y : Does a "bitwise and". Each bit of the output is 1 if the corresponding bit of x AND of y is 1, otherwise it's 0.

"bitwise and" works like this:

>>> 1 & 0
0
>>> 0 & 0
0
>>> 1 & 1
1