Multiple Functions in Single Program of Python

Function Program in Python :

 import math

def greet():

    print("Hello! Welcome to the advanced functions program.")

def quadratic_formula(a, b, c):

    discriminant = b**2 - 4*a*c

    if discriminant > 0:

        x1 = (-b + math.sqrt(discriminant)) / (2*a)

        x2 = (-b - math.sqrt(discriminant)) / (2*a)

        return x1, x2

    elif discriminant == 0:

        x = -b / (2*a)

        return x

    else:

        return "No real roots"

def calculate_factorial(n):

    if n == 0:

        return 1

    else:

        return n * calculate_factorial(n-1)

def fibonacci_sequence(n):

    sequence = [0, 1]

    for i in range(2, n):

        sequence.append(sequence[i-1] + sequence[i-2])

    return sequence

def main():

    greet()

    

    print("\n1. Quadratic Formula Solver")

    a = float(input("Enter the value of a: "))

    b = float(input("Enter the value of b: "))

    c = float(input("Enter the value of c: "))

    roots = quadratic_formula(a, b, c)

    print("Roots:", roots)

    

    print("\n2. Factorial Calculator")

    num = int(input("Enter a number to calculate its factorial: "))

    factorial = calculate_factorial(num)

    print("Factorial:", factorial)

    

    print("\n3. Fibonacci Sequence Generator")

    length = int(input("Enter the length of the Fibonacci sequence: "))

    fibonacci = fibonacci_sequence(length)

    print("Fibonacci Sequence:", fibonacci)

if __name__ == "__main__":

    main()

This program demonstrates the use of functions for different purposes:

1. greet(): A simple function to greet the user.
2. quadratic_formula(a, b, c): Computes the roots of a quadratic equation given coefficients a, b, and c.
3. calculate_factorial(n): Calculates the factorial of a given number n.
4. fibonacci_sequence(n): Generates a Fibonacci sequence of length n.
5. main(): The main function that orchestrates the execution of the program.