Final answer:
The code is assigning a double value to an integer variable. The variable should be changed to double.
Step-by-step explanation:
The error in the code is that the Math.sqrt function returns a double value, but the result is being assigned to an integer variable.
To fix this, you should change the data type of the variable s to double instead of int.
Here is the corrected code:
double s = Math.sqrt(49);