Final answer:
The question involves writing an expression in a programming language, such as Python, that compares the first character of user input to the first letter of a target string, which would align with the subject of Computers and Technology at the High School level.
Step-by-step explanation:
The question is asking to write an expression that determines if the first character of user input is the same as the first letter of a given string. In most programming languages, this can be done by taking the first character from both the user input and the target string and comparing them for equality.
Here's an example using Python:
user_input = input("Enter your input:")
target_string = "example"
matches_first_letter = user_input[0] == target_string[0]
print("Does the first character match the first letter?", matches_first_letter)
By utilizing the indexing operation, which accesses the first element of a string, the expression compares the characters and stores the result as a boolean value in the variable matches_first_letter. This boolean value indicates whether there is a match or not.