Is it possible to set a function within one m file and use that function in matlab?

In Python, we can set a function and use function at a same file.

then,Is it possible to set a function within one m file and use that function in matlab?

for example, i want to make summantion function like this,

clear all; close all; clc
N1=1; N2=100;
function summation(N1,N2)
x=0;
for ct=N1:N2
    x=x+ct;
end
end
summation(N1,N2)

Answer 1

[Walter Roberson]

Yes. The function definition must be after the script calling it, and the name of the script cannot be the same as the name of the function.

[Jong Rok Lee]

Thank you for your answer

so.. you mean that is impossible.. right?

[Stephen23]

"so.. you mean that is impossible.. right?"

Your original question was "Is it possible to set a function within one m file and use that function in matlab? " and Walter Roberson answered "Yes".

In any case, the best place to learn about MATLAB is by reading the documentation:

https://www.mathworks.com/help/matlab/matlab_prog/local-functions-in-scripts.html

[Walter Roberson]

clear all; close all; clc
N1=1; N2=100;
summation(N1,N2)
function summation(N1,N2)
    x=0;
    for ct=N1:N2
        x=x+ct;
    end
end

stored in a file that is not named summation.m

[Walter Roberson]

What is not possible in MATLAB is a function definition in the middle of a script. It is possible to define a function in the middle of a function.

function drive_my_car
N1=1; N2=100;
    function summation(N1,N2)
        x=0;
        for ct=N1:N2
            x=x+ct;
        end
    end
summation(N1,N2)
end

[Jong Rok Lee]

Thanks for your answer.

Now i can understand everything.

In python, The function definition must be before the script calling it so i confused.