Handle error from input

I have two input from user, the first input is receive name(string), the second is receive calorie(numeric). But sometimes user input a string to the second input, how i can handle the error from default matlab using my customize error message?

nama = input("Input your name: ", 's');

kal = input("Input your maximum calories: ");

if(~isnumeric(kal))

msg = "Error: Please input numeric to calorie");

error(msg);

end

But the result is always default error message from matlab,

Error using input

Unrecognized function or variable 'q'.

Error in main (line 5)

kal = input("Input your maximum calories: ");

Error in app (line 5)

[nama, kal] = main();

Answer 1

[Ive J]

AFIK input doesn't let you control the error behavior. The better approach would be to return it as a string, and validate it:

kal = input("Input your maximum calories: ", "s");
kal = double(string(kal)); % str -> double
if isnan(kal)
    error("Error: the value must be of numeric data type!")
end