Answer: 18
Step-by-step explanation:
If you enter the following code in IDLE:
>>> print(3 + 15)
The output displayed in the console will be:
18
This is because the code is asking the Python interpreter to add the numbers 3 and 15 together, and then print the result to the console. The sum of 3 and 15 is 18, which is what will be displayed in the output.