MATLAB Global Variables

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MATLAB Global Variables

Author：JIYIK Last Updated：2025/04/18 Views：

This tutorial discusses how to globalshare variables between multiple functions by declaring them as in MATLAB.

In MATLAB, you `global`can share variables between multiple functions by declaring them as

If a variable is defined inside a function, then it can only be used inside that particular function and you cannot access or change it from another function. These types of variables are called local variables. If you want to share variables with multiple functions, then you must define them as globalglobal variables. You can access and change global variables in any function. For example, let us define two functions with the same global variable and set its value in one function and get its value from another function so that we know that the variable is shared between both functions. First, define a setfunction called global that sets the value of the variable and saves it with the same name as the function name. Refer the code below.

function set(val)
global s
s = val;

Now, create another getfunction named to get setthe value of the variable that we set in the function and store it with the same name as the function name. Refer the code below.

function x = get
global s
x = s;

Now create another script file and use the following code to test the global variable. It should return setthe value you stored using the function. Refer the code below.

set(100)
x = get

Output:

x =

        100

As you can see in the output, setthe value we stored using the function getis returned by the function because the variable is a global variable.

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