CS 111 - 9/27/16

Exam 1 in class on Thursday 9/29/16
   20 multiple choice questions (3 pts each)
    2 write code questions ( 20 pts each)


x = 1
z = 0

for w in range(5):
  z = z + x
  x = x + 1
---------
Answer

x: 1  2  3  4   5   6
z: 0  1  3  6  10  15


=============
# the above code is the sanme as the follow
x = 1
z = 0

z = z + x
x = x + 1

z = z + x
x = x + 1

z = z + x
x = x + 1

z = z + x
x = x + 1

z = z + x
x = x + 1

====================

z = 0

for w in range(5):
  z = z + w

w:   0   1    2    3     4
z: 0   0    1    3    6    10

==================

z = 0
x = 0

for w in range(5):
   x = 8 - w
   z = z + x

w:     0     1     2     3    4
x:  0     8     7     6    5    4
z:  0     8    15    21   26   30

=============================
z = 0
x = 1

for w in range (6):
    x = w % 3
    z = z + x

w:    0      1      2      3     4     5
x: 1     0      1      2      0     1     2
z: 0     0      1      3      3     4     6

 From Long Division:   10 / 3 ==>  3 R 1

 For the Modulus OP:   10 % 3 ==>      1

====================================

       5 + 4 * 2


       10 - 3 - 2   
======================
x = 0

z = 1

for i in range (5):

   x = x + z

   z = z + i

i:   0    1    2     3      4
x: 0   1    2     4      8     15
z: 1   1    2     4      7     11





 Modulus gives the remainder from a long integer division