I can't deal with this code.Please help me:)

clear all;
close all;
clc;
n= input("Enter  an number to calculate its fibonacci number: "))
F = [1 1];    % Initially F has two elements
for i = 1:(n-2);        
    F(end+1) = F(end-1) + F(end);

if n> 0:
   disp("You entered a positive number.List every fibonacci number smaller or equal than the given number")
else n<0:
   disp("You enteres a negative number.Please enter the positive one!")
end

[Kishore]

clear all;
close all;
clc;
n= input("Enter  an number to calculate its fibonacci number: ")
F = [1 1];    % Initially F has two elements
for i = 1:(n-2);        
    F(end+1) = F(end-1) + F(end);
    if n> 0
       disp("You entered a positive number.List every fibonacci number smaller or equal than the given number")
    else n<0
       disp("You enteres a negative number.Please enter the positive one!")
    end
end

Answer 1

[KSSV]

https://in.mathworks.com/matlabcentral/answers/430515-for-loop-for-fibonacci-series

Answer 2

[Kishore]

clear all;
close all;
clc;
n= input("Enter  an number to calculate its fibonacci number: ")
F = [1 1];    % Initially F has two elements
for i = 1:(n-2);        
    F(end+1) = F(end-1) + F(end);
    if n> 0
       disp("You entered a positive number.List every fibonacci number smaller or equal than the given number")
    else n<0
       disp("You enteres a negative number.Please enter the positive one!")
    end
end

[Walter Roberson]

If n is not at least 3, then the body of the for loop will not be executed, and so the test whether n<0 would not be executed.

The code also does not ensure that n is an integer.