Basic algos and math solvers

Algos.py

__author__ = 'user'

def fibonocci_sequence():
    a, b = 0, 1
    while b<100:
        print(b)
        a, b = b, a+b

fibonocci_sequence()

def prime_numbers():
    for i in range(2,20):
        for j in range (2,i):
            if i%j == 0:
                print (i, 'equals', j, '*', i//j)
                break
        else:
            print(i, 'is a prime number')

def even_odd_num():
    for i in range (1,100):
        if i%2 == 0:
            print (i, 'is even number')
        else:
            print (i, 'is odd number')
even_odd_num()

def divisible_by_3_or_5():
    for i in range(1,100):
        if i%3 == 0 and i%5 == 0:
            print(i,' is divisible by 3 and by 5')
        elif i%3 == 0:
            print(i,' is divisible by 3')
        elif i%5 == 0:
            print(i,' is divisible by 5')
        else:
            print(i,'-----')
divisible_by_3_or_5()

def quadratic_equation():
    import math
    a,b,c = 1.0,-7.0,12.0
    det = math.pow(b,2)-4*a*c
    print ("det = "+str(det))
    if det < 0:
        print("Ne postoje rijesenje za te parametre")
    elif det == 0:
        x1, x2 = -b/(2*a), -b/(2*a)
        print("x1 = "+ str(x1))
        print("\n")
        print("x2 = "+ str(x2))
    elif det > 0:
        x1, x2 = (-b+math.sqrt(det))/(2*a), (-b-math.sqrt(det))/(2*a)
        print("x1 = "+ str(x1))
        print("\n")
        print("x2 = "+ str(x2))
quadratic_equation()