Final answer:
To detect if the first character of user input matches the first letter, use an if statement with a comparison operator.
Step-by-step explanation:
To detect if the first character of user input matches the first letter, you can use an if statement with a comparison operator. Here's an example in Python:
user_input = input('Enter a word: ')
if user_input[0].lower() == user_input[0].lower():
print('The first character matches the first letter.')
else:
print('The first character does not match the first letter.')
In this example, user_input[0] represents the first character of the input, and user_input[0].lower() converts it to lowercase for comparison. The lower() method ensures that uppercase and lowercase letters are treated as the same.