In python, there are exception cases where there empty conditionals are needed or breaking out of a while loop forcefully. The following article will explain the usages for the break, continue, and pass keywords.
The break keyword is used to break out of while loops. This allows for while loops to operate without the need of a conditional.
The code segment below simply shows the multiples of 25 up to 100
x = 0 while True: x += 25 print(x) if x >= 100: break
25 50 75 100
The code segment below constructs a list of names given by the user’s input. The input “exit” represents the end of the string.
newList =  while True: tempName = input() if tempName.lower() == “exit”: break newList.append(tempName) print(newList)
John Abby Britney Donald Mike exit
['John', 'Abby', 'Britney', 'Donald', 'Mike']
The continue keyword is used to end an iteration in a for loop or while loop. This skips all code that proceeds it and starts the next iteration.
This code will print every multiple of 10 below 100 that is also not a multiple of 3.
x = 0 while x < 100: x += 10 if x % 3 == 0: continue print(x)
10 20 40 50 70 80 100
This code will remove all vowels from a string by converting it to a list of characters, then removing each vowel from the list.
vowelList = [‘a’, ‘e’, ‘i’, ‘o’, ‘u’] testString = “The quick brown fox jumps over the lazy dog” testList = list(testString) finalList =  for i in range(len(testString)): if testList in vowelList: continue finalList.append(testList) print(‘’.join(finalList))
Th qck brwn fx jmps vr th lzy dg
The pass keyword is used as filler for future code. It is used as a null statement as to not create errors from empty functions and conditionals.
It can also be used for an empty conditional if the code block requires the use of many elif statements.
The following example is of a function that does nothing. def newFunction(): pass print(“No errors created”)
No errors created
The following code sorts values of a list that are not multiples of 5 into lists of multiples of 2, 3, and both.
testList = [63, 50, 15, 18, 22, 27] twomultiples =  threemultiples =  both =  for value in testList: if value % 5 == 0: pass elif value % 2 == 0 and value % 3 == 0: both.append(value) else: if value % 2 == 0: 2multiples.append(value) if value % 3 == 0: 3multiples.append(value) print(‘Multiples of 2:’, str(twomultiples)) print(‘Multiples of 3:’, str(threemultiples)) print(‘Multiples of both:’, str(both))
Multiples of 2:  Multiples of 3: [63, 27] Multiples of both: