What Python code would you use to create the Fibonacci series iteratively?

Question Analysis

The question asks you to write Python code to generate the Fibonacci series using an iterative approach. The Fibonacci series is a sequence of numbers where each number is the sum of the two preceding ones, usually starting with 0 and 1. An iterative approach involves using loops rather than recursion to generate the series.

Answer

Here's how you can create the Fibonacci series iteratively in Python:

def fibonacci_series(n):
    # Initialize the first two Fibonacci numbers
    fib_sequence = [0, 1]
    
    # Generate the Fibonacci series up to the nth number
    for i in range(2, n):
        next_number = fib_sequence[i-1] + fib_sequence[i-2]
        fib_sequence.append(next_number)
    
    return fib_sequence[:n]

# Example usage:
n = 10  # Number of elements in the Fibonacci series
print(fibonacci_series(n))

Explanation:

• Initialize a list fib_sequence with the first two numbers of the Fibonacci series: 0 and 1.
• Use a for loop to iterate from 2 to n-1.
• Calculate the next Fibonacci number by summing the last two numbers in the list.
• Append each new Fibonacci number to the list.
• Return the Fibonacci series up to the nth number.

This code will output the first n numbers in the Fibonacci series, providing a clear and efficient solution using an iterative approach.