unit-5.md

Unit 05

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Table of Contents

• String Module
• while loop
• break
• continue
• else

String Module

The String module contains tools for working with strings. You can read the official docs here.

# Including the String module
import string

# string module constants
print(string.ascii_letters)
# result: abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ
print(string.ascii_lowercase)
# result: abcdefghijklmnopqrstuvwxyz
print(string.ascii_uppercase)
# result: ABCDEFGHIJKLMNOPQRSTUVWXYZ
print(string.digits)
# result: 0123456789
print(string.hexdigits)
# result: 0123456789abcdefABCDEF
print(string.whitespace)
# result:
print(string.punctuation)
# result: !"#$%&'()*+,-./:;<=>?@[\]^_`{|}~

Loops: while

Do something while statement is True.

i = 1 # set variable i equal to the value of 1
while i < 6: # as long as i (1) is less than 6, run the following
  print(i) # print i (1 on the first round)
  i += 1 # after printing i (1), add 1 to i (1). i is now 2

Loops: break

The break keyword is used to break out of a loop.

for i in range(10): # for each number 0-9, run the following
  if i == 3: # on every loop, check if i == 3
    print('skip 3')

    # return to the top of the loop
    continue

  if i == 7:
    print('Goodbye!')

    # exit the loop
    break

  print(i) # print the current value of i

Loops: continue

# Skip the iteration if the variable i is 3, but continue with the next iteration:
for i in range(9):
  if i == 3:
    continue
  print(i)

Loops: else

Do something while statement is True. When it is no longer True, do something else. The else code block will only be triggered if a loop ends "naturally", when its condition becomes False. It will not be triggered if a loop is broken with break.

i = 1 # set variable i equal to the value of 1
while i < 6: # as long as i (1) is less than 6, run the following
  print(i) # print i (1 on the first round)
  i += 1 # after printing i (1), add 1 to i (1). i is now 2
else: # the moment, i is 6, the while statement goes from True to False
  print("i is no longer less than 6") # this will now print

Lab 5 - Password Generator

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