How do I stop MATLAB from giving me this warning? ( Global variables are inefficient and make errors difficult to diagnose. Use a function with input variables instead.)

This is the code i used, how do i remove the warning underline below global?

clc;clearvars;close all;

global x

x=5;

A = hello

function A=hello()

global x

A= 5*x;

end

Answer 1

[Star Strider]

The obvious solution is DO NOT USE GLOBAL VARIABLES!

Here, thie solution is —

 x=5;
 A = hello(x)

A = 25

 
  function A=hello(x)
      A= 5*x;
  end

Define the function to have an argument and then pass the argument to it.

See the documentations ection on Function Basics for details.

.

Answer 2

[Image Analyst]

I haven't tried that one but I'm attaching my function for turning off other warnings.

There are instructions in there for how to figure out how to turn off a particular warning such as the global one you're referring to. Follow those instructions and adapt the function then call it in your opening routine.