Solution 1:

use_int = int(input("Please enter an integer."))

print(use_int + 10)

Solution 2:

use_int = input("Please enter an integer.")

print(int(use_int) + 10)

Either of these solutions is acceptable.  However, the first solution is preferred since if you want to get an integer from a user so that you can use it later, it is better to change it to an integer earlier rather then later.  This is especially true when you want to use the user entered integer multiple times since if the user entered integer is changed to a number as soon as it is created rather than later, int() won't have to be used every time you want to use the user entered integer.  The same applies to the usage of float() on user entered floats.