Loops in Python

What are Loops?

A loop is used to execute a block of code repeatedly.

Python mainly provides two types of loops:

1. for Loop

The for loop is used to repeat a block of code for each item in a sequence.

for i in range(5):
    print(i)

0
1
2
3
4

2. range() Function

The range() function generates a sequence of numbers.

for i in range(1, 6):
    print(i)

1
2
3
4
5

The ending value in range() is not included.

3. while Loop

A while loop executes a block of code as long as its condition is True.

i = 1

while i <= 5:
    print(i)
    i += 1

1
2
3
4
5

4. break Statement

The break statement stops the loop immediately.

for i in range(1, 6):

    if i == 4:
        break

    print(i)

1
2
3

5. continue Statement

The continue statement skips the current iteration and moves to the next iteration.

for i in range(1, 6):

    if i == 3:
        continue

    print(i)

1
2
4
5

6. Practical Example

We can use loops to print the multiplication table of a number.

number = 5

for i in range(1, 11):
    print(number, "x", i, "=", number * i)

5 x 1 = 5
5 x 2 = 10
5 x 3 = 15
5 x 4 = 20
5 x 5 = 25
...
5 x 10 = 50

Quick Quiz