Sometimes a programmer wants to execute a group of statements a certain number of times. This can be done using loops. Based on this, loops are further classified into the following types: for loop, while loop, nested loops.

for Loop

For loops can iterate over a sequence of iterable objects in Python. Iterating over a sequence is nothing but iterating over strings, lists, tuples, sets, and dictionaries.

Example: iterating over a string:

name = 'Abhishek'
for i in name:
    print(i, end=", ")

Output:

A, b, h, i, s, h, e, k,

Example: iterating over a tuple:

colors = ("Red", "Green", "Blue", "Yellow")
for x in colors:
    print(x)

Output:

Red
Green
Blue
Yellow

Similarly, we can use loops for lists, sets, and dictionaries.

What if we do not want to iterate over a sequence? What if we want to use a for loop for a specific number of times?

Here, we can use the range() function.

Example:

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

Output:

0
1
2
3
4

Here, we can see that the loop starts from 0 by default and increments at each iteration.

But we can also loop over a specific range.

Example:

for k in range(4, 9):
    print(k)

Output:

4
5
6
7
8