python cheat sheet

mystring = ""
for items in range(5):
    mystring = mystring + str(items)
    print(mystring)

#or

mystring = ""
index = 0
while index < 5:
    mystring = mystring + str(index)
    print (mystring)
    index = index + 1

def calc(num1, num2, operation):
    if operation=="sum":
       return sum(num1, num2)
    elif operation=="product":
        return product(num1, num2)
    elif operation=="diff":
        return diff(num1, num2)
    elif operation=="div":
        return div(num1, num2)
    else  :
        print ("No operation")
    
def sum(a, b):
    myvar1 = a+b
    return myvar1

def product(a, b):
    myvar2 = a*b
    return myvar2

def diff(a, b):
    myvar3 = a-b
    return myvar3

def div(a, b):
  if b!=0 :
      return (a//b)
  else:
      print ("Error")

print (calc(10,0,"div"))
print (calc(1,2,"sum"))
print (calc(4,2,"diff"))
print (calc(9, 3,"div"))
print (calc(2, 12,"product"))

index = 0
index2 = 0
Fibo = ""
while index < 50:
    if index == 0:
        Fibo = Fibo + str(index)
        index = index + 1
    elif index > 0:
        Fibo = Fibo + ", " + str(index)
        index = index + index2
        index2 = index-index2 
print (Fibo)

while True:
        word = input("Please enter a word")
        index = 0
        reverse = ""

         while int(index) < len(word):
                  reverse = word[index] + (reverse)
                  index = int(index) + 1

        print("Reverse: ",reverse)

even = 0
odd = 0
while True:
    mynum = int(input("Enter the positive number: "))
    if mynum > 0:
        if mynum%2 == 0:
            even = even + 1
        elif mynum%2 != 0:
            odd = odd+1
    elif mynum < 0:
        break
print (even, (" of them are even."))
print (odd, (" of them are odd."))

import random 

mylist = ['happy', 'love' , 'flower' , 'golden' , 'valentine', 'rainbow']
score = 0
chance = 5
print (mylist)

random_item = random.choice(mylist)

while chance > 0 :
    user_guess = input("Guess a word: ")
    if user_guess == random_item:
        print ("That's correct!")
        score = score  + 100
        print ("Score: ",score)
        random_item = random.choice(mylist)
    else:
        chance = chance - 1
        print ("Chance Remaining: ",chance)
        if user_guess in mylist:
            print ("Sorry, wrong choices")
        else:
            print ("Sorry, that is not even in the list !")
print ("Final Score: ",score)
print ("Game Over!The word was",random_item)

whileList = ['Guy','Pop','Pat','Kim','Cliff','Anon']
index = 0
while index < len(whileList):
    print (whileList[index])
    index = index + 1 

#Example 1
def max2(num1, num2):
    maxvalue = num1

    if num2 > maxvalue:
        maxvalue = num2
    return maxvalue
print (max2(3,5))


#Example 2
def max3(num1, num2, num3):
    maxvalue = num1

    if num2 > num3 > maxvalue:
        maxvalue = num2

    elif num3 > num2> maxvalue:
        maxvalue = num3
    return maxvalue
print (max3(3,5,9))


#Example 3
def maxlist(list):
    maxvalue = list[0]
    for num in list:
        if maxvalue < num:
            maxvalue = num
    return maxvalue
print (maxlist(range(0,56)))

def areaOfCircle(r):
    if r <= 0:
        return "Error"
    pi = 3.1415
    area = pi*r**2
    return area
user_radius = float(input("Enter the radius: "))
radius = float(user_radius)

print ("the area of the circle is",areaOfCircle(radius))

def isPalindrome(word):
    index = 0
    while index < 1/2*len(word):
          if word[index] == word[len(word)-1-index] :
             index = index+1
          else :
             return False
    return True

while True:
    word = input("Enter your word: ")
    if word == str("quit"):
        break
    else:
       if isPalindrome(word) == True :
             palindrome = (word + str(" is a palindrome."))
       else :
             palindrome = (word + str(" is not a palindrome."))
           
    

    print(palindrome)