Fibonacci sequence with loop

I need help with these exercise:

Write a function Fibonacci(n) that takes n as an

input and produces the corresponding Fn as an output

• Use a for loop that computes the first 10 numbers (1<= n <= 10)

• Use a while loop that computes all Fibonacci numbers below 1000 (All n that Fn<1000).

If you can also add explanations it will be perfect

[James Tursa]

What have you done so far? What specific problems are you having with your code?

[Lisa Fontana]

I haven't actually done anything, I don't know how to write the function with for and while loop..

Answer 1

[Prasad Reddy]

clc
clear all
Fibonacci(1000)
function fibn=Fibonacci(n)
fibn=[1 1];
i=3;
while fibn(i-1)<n
    fibn(i)=fibn(i-2)+fibn(i-1);
    i=i+1;
end
fibn=fibn(1:end-1);
end
% This is code in While loop. please try to understand it. if dont understand please leave a comment.
% Please give a up thumb if this code works. thank you in advance.

[Lisa Fontana]

Thank you very much!! Now it is much more clear for me

Answer 2

[Prasad Reddy]

clc
clear all
Fibonacci(10)

function fibn=Fibonacci(n)           % we are defining a function Fibonacci
fibn=[1 1]                           % initialiing first two values for fibonacci series
for i=3:n                            % since already two values are present we are starting the loop from third element 
    fibn(i)=fibn(i-2)+fibn(i-1);     % i th element in fibnochi series is the sum of previous two elements 
end
end

[Prasad Reddy]

This the how to do it in a function.

[Lisa Fontana]

This actually works but the exercise also asks to use a while loop that computes all Fibonacci numbers below 1000

[James Tursa]

@Prasad: Please don't provide complete solutions to homework questions.

[Prasad Reddy]

Actually i am new to this cody community. How to identify whether a question is a Home work question or not?? i am littel confused.

[Lisa Fontana]

This is not homework, I'm learning to use MatLab on my own because I'll need it for my traineeship, so it would be very helpful for me having the answer since I'm not following any course

[Prasad Reddy]

@ James Tursa I am in a hurry to become a MVP in this group. I am answering as many questions as possible every day. but please say how to avoid Home work Questions.

[Prasad Reddy]

@ Lisa Fontana Ok madam i can understand. post any questions which you dont understand, we are ready to help. It seams that this is your firt question in this community. happy learning.

[Lisa Fontana]

Yes this is my first question! The lab that will host me sent me some slides with exercises but they're not complete; at the beginning the exercises were intuitive but now they are getting complex. thanks for the help and availability, good evening

Answer 3

[Tanuj Monu]

function f = fib(n)
  f(1) = 1;
  f(2) = 1;
  for i = 3:n 
      f(i) = f(i-1) + f(i-2);
  end
  f = f(end);
end