2. Loops

2.1. for loop

for i in range(5):
    print(i)

0
1
2
3
4

for i in range(2, 6):
    print(i)

2
3
4
5

for i in range(2, 7, 2):
    print(i)

2
4
6

2.2. while

# i is our "iterator variable"
i = 0
while i < 10:
    print(i)
    i += 1

0
1
2
3
4
5
6
7
8
9

# i is our "iterator variable"
i = 6
while i < 10:
    if i == 7:
        print('Lucky 7')
        i += 1
        continue

    print(i)

    i += 1

6
Lucky 7
8
9

# i is our "iterator variable"
i = 6
while i < 10:
    if i == 7:
        print('Lucky 7')
        break

    print(i)

    i += 1

6
Lucky 7

2.3. iterate over iterables

for car in ['BMW', 'Audi', 'Mercedes']:
    print(car)

BMW
Audi
Mercedes

2.4. Exercise - part 1

  1. Create dictionary of hosts where you store date of connection check and status if it went well

    • You can define list of hosts ex. wp.pl, google.com, ing.pl, nonexisting.domain

Hint

You may get date by using datetime, you may also get the data from system using os.popen

2.5. Exercise - part 2

  • create list of even numbers from 0 to 100,

  • print this list