Integer vs string?

Question

What is the output?
x=10
Y=x+2
int(str(y)+"2")
print(y)
Solution: 12

x equals 10 so:
y equals 12 (x+2)

Shouldn't "(int(str(y)+"2") change the number 12 into a string? And as such, shouldn't the answer be "12" + "2" or "122".

Thanks for any help anyone could provide.

Answer 1

The result is 12 because the statement int(str(y) +"2") doesn't do anything. Change it to y = int(str(y) +"2") to store the result of the operation in y and the result will be 122.

Answer 2

Well, it actually does calculate 122, but that value isn't saved anywhere. See this example:

i = 5
i + 9
print(i) #5

The second line tells python to calculate 5+9 and that is what python will do. But the result is immediately discarded because it isn't saved anywhere. If you do this:

i = 5
i = i + 9
print(i) #14

, the value is actually assigned to the variable i.

Answer 3

Thanks Anna! Any idea on why it doesnt do anything? Shouldnt the int(str(y)+"2") then become the new value of y (which is asked to print)?

Answer 4

Thanks Anna for your very clear explanation👍🏻