Lecture 69:- Let's Code Fibonacci

Certainly! Here's an example implementation of the Fibonacci series using iteration in Python:

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def fibonacci(n):    if n <= 0:        return []    fibonacci_sequence = [0, 1]  # Initialize the sequence with the first two Fibonacci numbers    while len(fibonacci_sequence) < n:        next_number = fibonacci_sequence[-1] + fibonacci_sequence[-2]  # Calculate the next Fibonacci number        fibonacci_sequence.append(next_number)    return fibonacci_sequence

Let's break down how the code works:

1. The fibonacci function takes one parameter, n, which represents the number of Fibonacci numbers to generate.
2. We start by handling the base case: if n is less than or equal to 0, we return an empty list since there are no Fibonacci numbers to generate in that case.
3. We initialize the fibonacci_sequence list with the first two Fibonacci numbers, 0 and 1.
4. We use a while loop to generate the remaining Fibonacci numbers until the desired length of n is reached.
5. In each iteration, we calculate the next Fibonacci number by summing up the last two numbers in the fibonacci_sequence list.
6. We append the next Fibonacci number to the fibonacci_sequence list.
7. Once the loop finishes, we return the fibonacci_sequence list containing the generated Fibonacci numbers.

Here's an example usage of the fibonacci function:

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result = fibonacci(10) print(result)  # Output: [0, 1, 1, 2, 3, 5, 8, 13, 21, 34]

In this example, we generate the first 10 Fibonacci numbers and store them in the result list, which is then printed. The output is [0, 1, 1, 2, 3, 5, 8, 13, 21, 34], representing the Fibonacci sequence up to the 10th number.