How to test to see if a user input is not a number?

y=input('Input a number')

if isnumeric(y) ~= 1
    disp('The entry is not a number')
end

I am asking the user to input a number. I would like to know how to test if a user has entered something, for example 'g'. At the moment when I input this, it says that 'g' is an unrecognised variable. I would like to know how to do this using the 'isnumeric' function.

[Rik]

I would suggest the strategy KSSV posted, as that circumvents problems like this:

y='1.2';
isnumeric(y)

ans = logical
   0

Answer 1

[KSSV]

y = input('Input a number: ','s') ; 

if isnan(str2double(y))
    disp('The entry is not a number')
end