Week 1, Wed, 4/2

0.8 - 0.7 == 0.1

False

a = 0.8 - 0.7
b = 0.1
abs(a-b)<1e-9

True

4%4

0

Method 1

x = []
for i in range(1,1001):
    if i%17 == 0:
        x.append(i)
len(x)

58

Using list comprehension

len([i for i in range(1,1001) if i%17 ==0])

58

Method 2, use range and step size

for i in range(17,100,17):
    print(i)

17
34
51
68
85

len(range(17,100,17))

5

Method 3, use math

1000//17

58

a = [1,2,3]
b = a
a[1] = 0

a

[1, 0, 3]

b

[1, 0, 3]