Final answer:
The output of the code "Hello".isalpha() is True.
Step-by-step explanation:
The output of the code "Hello".isalpha() is True. The isalpha() method is used to check if all the characters in a string are alphabetic. In this case, the string "Hello" consists of only alphabetic characters, so the output is True. If the string had contained any non-alphabetic characters, the output would have been False.