Function calling: Can someone help me in figuring out why is the main function not runing ?

I have created 3 functions 3 different files. every thing i try to run from main it gives me following error:

Can someone help me in figuring out why is the main function not runing ? I post my files below.

main

Attempt to execute SCRIPT main as a function:

/MATLAB Drive/main.m

Error in main (line 1)

main file

%main function
main file

num = input('Enter the number you want to find the square root: ');
sqroot(num);
sqroot.m

% Sqrt Calculator Function_____________
function [sq_root] = sqroot(num)
    format long
    converge = false;
    iter = 0;
    
    %Max allow of error
    esp = 10^-10;
    
    %intial guess
    xn=1;
    %disp('iter, x_n, err_est; err_exact');
    
    tru_err_arr = [];
    est_err_arr = [];
    iter_arr = [];
    
    %Using newton-raphson method to find sqrt
    
    if num >= 1
        xn =1;
        while xn^2<num
            xn = xn+10;
        end
        xn = xn/2;

    else
        xn =1;
        while xn^2>num
            xn = xn/10;
        end
        xn = xn*2;
    end
    
    while converge == false

        %Function definations

        f = xn^2-num;
        df = 2*xn;

        %newton_raphson
        nr = xn -(f/df);

        %error defination
        tru_err = sqrt(num)-xn;
        err_est = nr-xn;
        
        tru_err_arr =[tru_err_arr, tru_err];
        est_err_arr =[est_err_arr, err_est];
        
        
        
        %error check
        if abs(err_est/xn)<esp
            converge = true;
        end

        %disp([iter, xn, err_est, tru_err]);

        %Iteration counter
        iter_arr = [iter_arr, iter];
        iter = (iter+1);
        xn=nr;

   end
    sq_root = xn;
    disp(['The sqrt of ', num2str(num),' is: ' ])
    disp(sq_root);
    info_plot(tru_err_arr, est_err_arr, iter_arr)
    
end
%Ploting function________________
info_plot.m

function info_plot(tru_err_arr, est_err_arr, iter_arr)
 figure(1)
 plot (iter_arr, abs(tru_err_arr), 'linewidth',2)
 hold on
 plot(iter_arr,abs(est_err_arr),'linewidth',2)
 xlabel('iteration')
 ylabel('Errors')
 legend('True Error','Estimated Error')
 title('Errors vs Graph')

Answer 1

[Mario Malic]

As you can see - Error in main (line 1)

Script should be working if you remove it

main file

[Fernando Piedra]

Thanks! That work but my ploting functions is nit working. Now i got this error

Enter the number you want to find the square root:

32

The sqrt of 32 is:

5.656854249492381

Error: File: info_plot.m Line: 11 Column: 26

All functions in a script must be closed with an 'end'.

Error in sqroot (line 70)

info_plot(tru_err_arr, est_err_arr, iter_arr)

Error in main (line 4)

sqroot(num);

[Fernando Piedra]

never i have figure out thanks

[Mario Malic]

This error is also easy, as it says, all functions must be closed with an end. You're missing an end in one of your functions.