What is wrong?

Question

Hello, I am a begginer and I don't know what is wrong with this. Can you help me? Thanks in advance.
https://code.sololearn.com/cUbdtoJXUHAF/?ref=app

Answer 1

The variables can of Double data type or Integer data type but not both.

Answer 2

there is nothing like int double
either it is
int x
OR
double x

so change those
int double x1 to
int x1
or
double x1