Loops

If...else

a = 200
b = 33

if b > a:
  print("b is greater than a")
elif a == b:
  print("a and b are equal")
else:
  print("a is greater than b")

Shorthand

if a > b: print("a is greater than b")

Short Hand If ... Else

print("A") if a > b else print("B")

Ternary Operators / Conditional Expressions

print("A") if a > b else print("=") if a == b else print("B")

pass Statement

if statements cannot be empty, but if you for some reason have an if statement with no content, put in the pass statement to avoid getting an error

if b > a:
  pass

While

break/continue Statement

i = 1
while i < 6:
  print(i)
  if i == 3:
    break # continue
  i += 1

else Statement

can run a block of code once when the condition no longer is true:

i = 1
while i < 6:
  print(i)
  i += 1
else:
  print("i is no longer less than 6")

For

break/continue

fruits = ["apple", "banana", "cherry"]
for x in fruits:
  print(x)
  if x == "banana":
    break #continue

range()

for x in range(6):
  print(x)

defaults to increment the sequence by 1, however it is possible to specify the increment value by adding a third parameter: range(2, 30, 3):

else

for x in range(6):
  print(x)
else:
  print("Finally finished!")

Note

The else block will NOT be executed if the loop is stopped by a break statement.

pass

for x in [0, 1, 2]:
  pass