What will be printed by the following block of Python code: def Add5(in): out=in+5; return out; print(Add5(10))?

The code defines a function named Add5, which takes an input parameter in. Inside the function, the input value is added to 5, and this result is stored in the variable out. The function then returns the value of out.

When you call Add5(10), the function receives the argument 10 for the parameter in. The calculation performed inside the function is 10 + 5, which equals 15. This result is assigned to out and subsequently returned.

Finally, the print statement outputs the returned value from the function call, which is 15. Therefore, the code prints 15, making it the correct answer.