List - []

word = 'programming'

	P 	r	o	g 	r 	a 	m 	m	i	n 	g
	0 	1 	2	3 	4   5   6   7 	8 	9 	10
  -11 -10  -9  -8  -7  -6  -5  -4  -3  -2  -1



  word[0]
  word[-2]
  word[3:3]
  word[4:9]
  word[:5] 
  word[8:]
  word[5:-3]

  len(word)

  #Len = Length

  square = 'Square'
  len(square)
  len(word) + len(square)

cube = [10, 20, 30, 40, 50]
cube
cube[30] = 40 
cube
cube[5] = 60 #error out of range
cube.append(60)
cube.append(4+10+20+36)
cube
cube.reverse()
cube
cube.sort()
cube
cube.remove(20)
cube
cube.pop()
cube 

cube1 = [10, 20, 30, 45, 50]
cube2 = [1, 2, 3, 4, 5]
cube1.extend(cube2)

del cube1[3]
del cube1[1:3]
del cube1[:]


ProgramA = ['A' , 'B' , 'C' , 'D' , 'E']
ProgramB = [ 'a' , 'b' , 'c' , 'd' , 'e']
ProgramC = ProgramA + ProgramB
ProgramC
['A' , 'B' , 'C' , 'D' , 'E' , 'a' , 'b' , 'c' , 'd' , 'e'  ]
ProgramD = [1, 2, 3, 4, 5]
ProgramC = ProgramC + ProgramD
ProgramC[9:] = []
ProgramC[5:9] = ProgramD
ProgramC

len(ProgramC)

a = [10, 20, 30, 40, 50]
b = [60, 70, 80, 90, 100]
c = [110, 120, 130, 140, 150]
x = [a, b, c]
x

x[2][3]
x[0][]
x[1][2]
x[1:2][1:2]
x[][]
x[0][0]
x[1][1]
x[]

x[1][2] + x[2][0]
x[0][1] - x[2][1]

