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Python For Loops

The for loop in Python is used for iterating over a sequence (such as a list, tuple, dictionary, set, or string). It's more like an iterator method than a traditional for loop.

Example 1: Looping Through a List

Print each name in a list of names.

# Looping through a list
names = ["Karthick AG", "Vijay", "John", "Durai"]
for name in names:
    print("Hello,", name + "!")

Hello, Karthick AG!

Hello, Vijay!

Hello, John!

Hello, Durai!

Example 2: Looping Through a String

Print each character in a string.

# Looping through a string
language = "Tamil"
for letter in language:
    print(letter)

T

a

m

i

l

Example 3: Using range() Function

Print numbers from 1 to 5 using range().

# Using range()
for number in range(1, 6):
    print("Number:", number)

Number: 1

Number: 2

Number: 3

Number: 4

Number: 5

Example 4: Nested For Loops

Print all combinations of names and cities.

# Nested for loops
names = ["Rudra", "Riya"]
cities = ["Trichy", "Karur"]
for name in names:
    for city in cities:
        print(f"{name} lives in {city}.")

Rudra lives in Trichy.

Rudra lives in Karur.

Riya lives in Trichy.

Riya lives in Karur.

Example 5: Looping Through a Dictionary

Print keys and values from a dictionary of freedom fighters.

# Looping through a dictionary
freedom_fighters = {
    "Velu Nachiyar": "Sivaganga",
    "V. O. Chidambaram Pillai": "Ottapidaram",
    "Subramania Bharathi": "Ettayapuram"
}
for name, place in freedom_fighters.items():
    print(f"{name} from {place}.")

Velu Nachiyar from Sivaganga.

V. O. Chidambaram Pillai from Ottapidaram.

Subramania Bharathi from Ettayapuram.

Explanation: The for loop is used to iterate over sequences. The range() function generates a sequence of numbers, and nested loops can be used to perform complex iterations.

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