# -*- coding: utf-8 -*-
"""
Created on Wed Sep 14 11:07:32 2022

@author: cpresser
"""

# Lists: ordered group of data

#locations  0    1    2   3   4
#           -5   -4  -3  -2   -1
grades = [ 87, 98.6, 73, 92, 100 ]

print(grades)

#each location holds arbitrary data
someData = [45, "Hello", True, [4,5,6] ]
print(someData)

#print the first item in grades (location 0)
print(grades[0])

print(grades[3])

#print(grades[5]) # out of range
print(grades[-2]) #negatives loop around from the end
#print(grades[-6])

grades[0] = 93
print(f"Grades: {grades}.")

grades[2] = 1.1*grades[2]
print(f"Adjusted grades: {grades}")

x1 = 5
x2 = x1  #make a copy of the value in x1
print(f"{x1}, {x2}")
x2 = 7
print(f"{x1}, {x2}")

#assigning lists
grades2 = grades
grades2[0] = 95
grades[1] = 90
print(f"Grades: {grades}.")
print(f"Grades2: {grades2}.")

#variables for lists are references
#variables for ints, floats... are values

# add to a list
grades.append(99)
grades.insert(0, 70) #add to the start
print(f"More Grades: {grades}.")
print(f"Grades2: {grades2}.")
print(grades[-1])

moreGrades = [81, 82, 83, 84]

#print out all as one list
# + appends one list to another
print(grades + moreGrades)
grades = grades + moreGrades
print(f"Grades: {grades}.")
print(f"Grades2: {grades2}.")

grades2.append(100)
print(f"Grades: {grades}.")
print(f"Grades2: {grades2}.")

#removing items
del grades[0]  #delete from location 0
print(f"Grades: {grades}.")