Loops and Strings

In this lesson, we will look at iterating over text using loops in Python. As we mentioned in the lesson on arrays, text in Python is an array of characters, which means we can iterate through each character in the text using a for or while loop.

Example: We want to iterate over each character in the word 'Python' and print it:

word = 'Python'
for character in word:
    print(character)
# This will print:
# P
# y
# t
# h
# o
# n

In this example, we go through each character in the string word and print it. The for loop iterates through each character in the string.

We could also use a while loop to achieve the same result, but you will agree that the for loop is much simpler:

word = 'Python'
index = 0
while index < len(word):
    print(word[index])
    index = index + 1

In this example, we use the variable index to iterate through each character in the string word and print it. The while loop continues as long as the variable index is less than the length of the string word.