For loop (for)

Both for loops and while loops can achieve the same results. However, a while loop is more flexible because its condition can be fully customised, whereas a for loop is more structured and is typically used for iterating over a sequence.

So, theorically for loop is not suitable for infite looping as the data sets will never be infinty

Usage

for n in x
    ... handle task (can based on n)...

• for and in is the keywords.
• x is Sequence Type (List, Tuple, Str)

Example

for-loop.py

text = str("HelloWorld")

for i in text:
    print(i)

Results:

H
e
l
l
o
W
o
r
l
d

Find number of "o" in the text of "HelloWorld" using for loop.

# text = "HelloWorld"

number_of_o = int(0)

for i in text:

    if i == "o":
        number_of_o += 1

print(f"Text - {text} has {number_of_o} o.")

Results:

Text - HelloWorld has 2 o.