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Python for Loop (with Examples)

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🎉 Let's Get Loopy: The Wild World of Python for Loops! 🐍​

So you're about to dive into the magical land of Python for loops? Buckle up, because you're going to repeat stuff until your code is so efficient it basically does the work for you. Think of a for loop as a fancy robot that goes through each item in a sequence and does your bidding.

Python lets you for loop through almost everything:

  • 🍕 List
  • 🎁 Tuple
  • 📚 Dictionary
  • 🌀 Set
  • 🧵 String
  • 📏 Range

🧠 The Loop Blueprint​

for val in sequence:
    statement(s)

Here, val is the super cool intern you’ve hired to go through your sequence and handle each item one by one. When the sequence is done—boom! The loop peaces out.

1. 🤹 Python for Loop with List​

You’ve got a list of names. You want to greet them. Let’s loop!

names = ["alex", "brian", "charles"]
for x in names:
  print('Current name is :', x)

🖨️ Output:

Current name is : alex
Current name is : brian
Current name is : charles

2. 🧵 Looping Through a Tuple (fancy list that can’t be changed)​

mytuple = ("item1", "item1", "item3")

for e in mytuple:
    print("Current item is", e)

🖨️ Output:

Current item is item1
Current item is item1
Current item is item3

3. 📓 Looping Through a Dictionary​

Dictionaries are like little boxes with labels and things inside. You can loop over keys, values, or both!

colors_dict = {'color': 'blue', 'fruit': 'apple', 'pet': 'dog'}

for key in colors_dict.keys():
    print(key)

for item in colors_dict.items():
    print(item)

🖨️ Output:

color
fruit
pet
('color', 'blue')
('fruit', 'apple')
('pet', 'dog')

4. 🔀 Looping Through a Set​

Sets are like bags of random things. Order is not guaranteed. Surprises await!

myset = set(["item1", "item2", "item3"])

for e in myset:
    print("Current item is", e)

🖨️ Output (order may vary!):

Current item is item3
Current item is item2
Current item is item1

5. 🔤 Looping Through a String​

Strings = chains of characters. Time to inspect each letter like a detective 🕵️.

name = "alex"
for x in name:
  print("Current char is", x)

🖨️ Output:

Current char is a
Current char is l
Current char is e
Current char is x

6. 🎯 Looping with range()​

Want to count stuff? Say hello to range() — Python's built-in number line.

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

🖨️ Output:

0
1
2
3
4

7. ⛔ break and 🕺 continue — Drama in the Loop​

Break: "I’m done. Bye!"​

names = ["alex", "brian", "charles"]

print("Loop started")

for x in names:
  print(x)
  if x == "brian":
   break;

print("Loop ended")

🖨️ Output:

Loop started
alex
brian
Loop ended

Continue: "Skip this one, move along!"​

names = ["alex", "brian", "charles"]

print("Loop started")

for x in names:
  if x == "brian":
   continue;
  print(x) 

print("Loop ended")

🖨️ Output:

Loop started
alex
charles
Loop ended

8. 🍩 for...else: The Plot Twist Ending​

When the loop ends without any interruptions (break), the else gets its moment to shine.

names = ["alex", "brian", "charles"]
 
for x in names:
  print(x) 
else:
  print("No name is left in the list")

🖨️ Output:

alex
brian
charles
No name is left in the list

Got questions? Confused by sets or strings? 🧠
Drop me your doubts — and remember...

🐍 Happy Looping, Pythonistas! 😄