Final answer:
The code 'print(mystring[2:5])' will output 'cde', which is a substring of 'abcdefg' including indices 2 to 4.
Step-by-step explanation:
The student's question pertains to the output of a specific operation using Python string slicing syntax. The line of code print(mystring[2:5]) will display a substring of the original string 'abcdefg', starting from index 2 up to but not including index 5.
In Python, the indexing of characters in a string starts at 0. Thus, mystring[2] corresponds to the character 'c', and the slice mystring[2:5] includes the characters at indices 2, 3, and 4. Therefore, the characters 'c', 'd', and 'e' will be printed, resulting in the output 'cde'.