while Loop

The while loop is used to repeatedly execute a block of code as long as a condition is true.

Syntax

while condition:
    statement

Example

count = 0
while count < 5:
    print("Count:", count)
    count += 1

for Loop

The for loop is used to iterate over a sequence (such as a list, tuple, string, or range).

Syntax

for variable in sequence:
    statement

for Loop Examples

>> for i in range(4):
>>     print("Iteration:", i)
Iteration: 0
Iteration: 1
Iteration: 2
Iteration: 3

>> for i in range(2, 4):
>>     print("Iteration:", i)
Iteration: 2
Iteration: 3

break Statement

The break statement is used to exit a loop prematurely.

Example

for i in range(10):
    if i == 5:
        break
    print("Iteration:", i)

continue Statement

The continue statement is used to skip the rest of the code inside the loop for the current iteration only, and continue with the next iteration of the loop.

Example

for i in range(10):
    if i % 2 == 0:
        continue
    print("Odd number:", i)

pass Statement

The pass statement is a null operation; nothing happens when it executes. It is used as a placeholder.

Example

for i in range(10):
    if i % 2 == 0:
        pass
    else:
        print("Odd number:", i)

..., A Special Placeholder

... is used the same way as pass, but it's really more like None. It's a singleton that does nothing.

I will use it when I want to indicate that the code is not complete.

Example

for i in range(10):
    if i % 2 == 0:
        ...
    else:
        print("Odd number:", i)