Question

Which is a valid input command

a. x = input('Enter a number: ');
b. input('Enter a number: ')
c. n = input('Enter your name: ','s');
d. both a and c

Answer 1

In a programming context, particularly Python, the valid input command among the options given is option a, where 'x' is assigned the value entered by the user.

Step-by-step explanation:

The question concerns valid input commands in a programming context, likely Python. Options a and c are both considered valid syntax for obtaining user input. Option a, x = input('Enter a number: '), is the standard way to prompt the user and store their input as a string in the variable x. Option c, n = input('Enter your name: ','s'), is not standard Python syntax and seems to imply a misconception with MATLAB's input syntax, which uses the 's' flag for obtaining string input. In standard Python, the 'input' function does not require an additional argument for strings as text input is default and always returned as a string. Therefore, the correct answer is only option a.