In our previous lecture, we learned about while loops in Python, now let us check ‘for loops in Python’. Aim of ‘for’ loop is same as that of while loop. However, for loop is used to iterate over a particular sequence or order. This loop can iterate over string, list, tuple, range and many more.

Syntax

for variable in sequence:
    Statements

for variable in range(0, req_itr):
    Statements

Let’s understand the working of for loop with the help of an example :

Program : To traverse a given list of items.

# for loop illustration

planets = ['mercury', 'venus', 'earth', 'mars']
for each_planet in planets:
    print(each_planet, end=' ')

Here, variable ‘each_planet’ is acting as a list element.

Above code can be written using range() function as well.