#!/usr/bin/env python
# coding: utf-8

# In[8]:


# Section 4.3 - for loops
# aside about lists
mylist=[1,2,3,5,7]
print("mylist is",mylist)
print("type(mylist) is",type(mylist))
anotherlist=['a',12345,12.2214,'more strings',1]
print(anotherlist)
print("type(anotherlist) is",type(anotherlist))
# can see particular entires in any list using list[#]
print("anotherlist[0] is",anotherlist[0])
print("anotherlist[1] is",anotherlist[1])
print("anotherlist[2] is",anotherlist[2])
print("anotherlist[3] is",anotherlist[3])
print("anotherlist[4] is",anotherlist[4])


# In[13]:


# syntax for for loops
# for var in list:
#    do stuff
#    do stuff
#    do stuff

# Example
primes=[2,3,5,7,11,13,17,19,23,29]
print("I will print some prime numbers for you.")
for num in primes:
    print(num)
    
# Do with strings
beatles=['George','Ringo','John','Paul']
for member in beatles:
    print(member)


# In[23]:


# range function
for num in range(5):
    print("Hello world! and num=",num)
print(range(5))
print("type(range(5)) is",type(range(5)))
print("list(range(5)) is",list(range(5)))
print("type(list(range(5))) is",type(list(range(5))))

# range with two inputs
# list(range(a,b)) gives a list [a,a+1,a+2,...,b-1]
print("list(range(5,10)) is",list(range(5,10)))


# In[35]:


# List of perfect squares and perfect cubes
# Tab symbol is written as \t in Python
print('Number\t Square\t Cube')
print('---------------------')
for num in range(1,11):
    print(num,"\t",num**2,"\t",num**3)


# In[44]:


# User-defined list of squares 
start=int(input("Input the first integer."))
end=int(input("Input the final integer."))
print("Number\t Square")
print("---------------")
for num in range(start,end+1):
    print(num,"\t",num**2)


# In[48]:


# Section 4.4 -- calculating a running total
# The idea is to have a variable that you continually update 
# Sum numbers programs

#max number of numbers
MAX=5
#our accumulator is set to 0
total=0.0
print("This program calculates the sum of",MAX,"numbers you will input.")
for var in range(MAX):
    newnumber=float(input("Give me a number."))
    total=total+newnumber
print("The total was",total)

#TABLE -- assume x=6
# Code            What it does               Value of x after
# x=x+4           adds 4 to x                10
# x=x-3           subtracts 3 from x         3
# x=x*2           multiplies x by 2          12
# x=x/2           divides x by 2             3
# x=x%4           finds remainder of x/4     2

# Augmented assignment operators
# Operators             Example             Equivalent to
# +=                    x+=4                x=x+4
# -=                    x-=3                x=x-3
# *=                    x*=2                x=x*2
# /=                    x/=2                x=x/2
# %=                    x%=4                x=x%4


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