Value user$\_$num is read from input. Write a while loop that iterates until user$\_$num is negative. In each iteration:

Update value final$\_$num as follows:

If user$\_$num is even, add user$\_$num to final$\_$num.

Otherwise, subtract user$\_$num from final$\_$num.

Then, read a value from input as an integer into variable user$\_$num. final$\_$num $=0$

user$\_$num $=$ int$($input$())$

$\text{'}\text{'}\text{'}$ Your code goes here $\text{'}\text{'}\text{'}$

print$($f$\text{'}$Final number is $\{$final$\_$num$\}\text{'})$