Python Cheat sheet - Pat

user_number = input("What number do you want to countdown?")
number = int(user_number)
countdown_String = ' '

while number > 0:
    countdown_number = countdown_string + str(number) + ""
    number = number + 1
#print number
print (countdown_string)

while True:
    user_input = int(input("what is your number:"))
    integer = user_input*10
    print (integer)
            
                     

if 3 < 2:                      #if statement must compare 2 booleans
    print ('3 is less than 2')
elif 4 < 2:                  #can have 0 or more elif statements.
    print ('4 is less than 2')
elif 5 < 2:
    print ('5 is less than 2')
else:                        #can have 0 or 1 else statement at the end
    print ('none of above are true')

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)
        
    
def sum(a, b):
    return (a+b)
def product(a, b):
    return (a*b)
def diff(a, b):
    return (a-b)
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"))
 

forlist = ['hi', 'hello', 'goodbye']
for gg in forlist:
    print(gg)

user_number = ''

while user_number != "0" :
    user_number = input ("Enter a number to convert to binary")
    number = int(user_number)
    binary_string = '"'"

while (number > 0)
    remainder = number%2
    binary_String = str(remainder) + binary_String
    number + number//2

print ("Binary string is", binary_string)

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)

import random

intlist = [1, 2, 3, 4, 5]
random_int = random.choice(intlist)
print(intlist, random_int)

fplist = [1.1, 1.2, 1.3, 1.4]
random_fp = random.choice(fplist)
print (fplist, random_fp)

strlist = ["Allo", "Stego", "Carno", "T-rex"]
random_str = random.choice(strlist)
print(strlist, random_str)

mylist = ["Yasashii", 1.3, 2]
random_item = random.choice(mylist)
print(mylist, random_item)

myvar1 = 1
myvar2 = 2
myvar3 = 3
varlist = [myvar1, myvar2, myvar3]
random_var = random.choice(varlist)
print(varlist, random_var)

wlist = [2, 4, 5, 6, 7, 8]
gg = 0
while gg < len(wlist):
    print (wlist[gg])
    gg = gg + 1