Python While and For Loops

Python has two loop commands — while and for loops. The while loop executes as long as a condition is true.

i = 0
while i < 6:
    i += 1  
    if i == 3:
        continue
    if i == 5:
        break
    print(i)
1
2
4

The for loop is used for iterating over a sequence (list, tuple, dictionary, set, or string).

fruits = ["apple", "banana", "cherry"]
for x in fruits:
    if x == "banana":
        continue
    print(x)
apple
cherry
# range(2, 6) is 2, 3, 4, 5
# i.e. there are 6 - 2 = 4 numbers starting from 2 and excluding 6
for x in range(2, 6):
    print(x)
else:
    print("Finally finished!")
2
3
4
5
Finally finished!

Three statements — break, continue and else — are used to control the iterations. The break statement stops and exits the loop before it’s conclusion. The continue statement stops the current iteration to move to the next. The else statement runs a block of code once the condition no longer is true.


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