Solution to Exercise 1

MATLAB Script Solution

abc = input('Please enter x: ', 's');
if abc ~= 'x', 
    fprintf('Error: you entered something else\n');
end

Code Explanation:

Line 1: Uses the input() function with 's' format to get string input from user
Line 3: Checks if the input is NOT equal to 'x' using the ~= operator
Line 4: Displays error message only when condition is true (user didn't enter 'x')
Line 5: Ends the conditional statement

Alternative Implementation (with else clause):

% Alternative approach with else clause
user_input = input('Please enter x: ', 's');
if strcmp(user_input, 'x')
    % Do nothing - user followed instructions
else
    fprintf('Error: You did not follow instructions!\n');
end

Note: This version uses strcmp() for string comparison, which is more robust for different data types.

Code Explanation:

Line 1: Uses the input() function with 's' format to get string input from user
Line 3: Checks if the input is NOT equal to 'x' using the ~= operator
Line 4: Displays error message only when condition is true (user didn't enter 'x')
Line 5: Ends the conditional statement