Type Conversion

Question

Hello so quick question regarding this problem for python:
What is the output of this code?
>>> float("210" * int(input("Enter a number:" )))
Enter a number: 2

The answer is 210210.0
I'm confused because I would have guessed 420.0 had I not entered it. Reason behind it is because I thought when you add "int" to a string it changes it to literally adding the string together to a math problem

Thank you in advance all advice is welcome and appreciated

Answer 1

yes the int conversion does occur on the input string but with your code
the input multiplication on a str is occuring before the float conversion.

alter the order of operations
float("210") * int(input("Enter a number:" ))

Answer 2

Well, if you hardcode the "210" value, so you don't need to type it in between quotes, then 210 will be an int, while "210" will be a string.
In the same way, 210.0 will be a float, while 210 will be a int...

>>> 210.0 * int(input("Enter a number"))

But, I guess maybe you want the input being also float, since you'll convert the entire result in float ^^
In this case, you should then write:

>>> 210.0 * float(input("Enter a number"))

Or if you only want intergers calculs:

>>> 210 * int(input("Enter a number"))

Answer 3

Okay thank you!
Just have to bring it back to basic algebra.