How to use inputs within a function?

function Discriminant (a)

a = input('Enter the value of a: ');

b = a*2

fprintf('The value of b is: %i', b)
end

This is an example of the code I am going to use. I want there to be a prompt for a user to enter a value of a, and in turn, my function will use that value of a in the formula, and print the value of b.

[Torsten]

Because of the numerous basic questions from your side, I suggest you invest two hours of your time to take the MATLAB online course free of costs:

https://matlabacademy.mathworks.com/details/matlab-onramp/gettingstarted

Then most of your questions will get answered automatically.

[TheSaint]

I do not see how to use inputs within a function in aforementioned course. Thanks for the input. I already know most of the basics, I am new to functions.

[Stephen23]

Regardless of the fact that you are using functions, have a look at your code:

function Discriminant (a)
a = input('Enter the value of a: ');

You define a somehow (as a function input... but really it does not matter how, all that matters is that it is defined because this basic principal applies to all variables all of the time). The you redefine a to be something else (using INPUT, but again it does not really matter how you do this).

If you want to use the original a that you defined, then don't redefine a to be something else.

INPUT... needs to be unlearned one day.

Answer 1

[Walter Roberson]

a = input('Enter the value of a: ');
Discriminant(a);

function Discriminant (a)
b = a*2
fprintf('The value of b is: %i', b)
end