Declaration of Variables

Does adding "Num" to a variable ensure that variable input from the user is a number?

[the cyclist]

I am not sure what you mean by "adding Num". Can you give an example of your syntax?

Are you talking about keyboard input [e.g the input() function]? That is going to be a string, and you need to convert to a number and put in safeguards for the input.

Answer 1

[Sean de Wolski]

No. It does not. If the input is a string you could convert it to a number and check and see e.g.

x = '3';
is_x_a_number = isnan(str2double(x))

Then if x can't be converted it'll fail, try:

x = 'hello world'