🚀 Day 47/150 – Average of List Elements in Python

 

Finding the average (mean) of a list means adding all elements and dividing by the total number of elements.

Formula:
Average = Sum of elements / Number of elements

Example:
[2, 4, 6, 8] → Average = (2+4+6+8)/4 = 5.0

Let’s explore different ways to calculate average 👇

🔹 Method 1 – Using sum() and len()

✅ Easiest and most recommended method.

numbers = [2, 4, 6, 8] avg = sum(numbers) / len(numbers) print("Average:", avg)

✅ Easiest and most recommended method.

🔹 Method 2 – Using for Loop

numbers = [2, 4, 6, 8]

total = 0

for num in numbers:
    total += num

avg = total / len(numbers)

print("Average:", avg)











✅ Good for understanding logic.

🔹 Method 3 – Taking User Input
numbers = list(map(int, input("Enter numbers: ").split()))

avg = sum(numbers) / len(numbers)

print("Average:", avg)





✅ Dynamic input from user.

🔹 Method 4 – Using while Loop
numbers = [2, 4, 6, 8]

i = 0
total = 0

while i < len(numbers):
    total += numbers[i]
    i += 1

avg = total / len(numbers)

print("Average:", avg)







✅ Alternative looping method.


🔹 Method 5 – Using Function
def average(lst):
    return sum(lst) / len(lst)

print(average([2, 4, 6, 8]))



✅ Clean and reusable.

🔹 Output
Average: 5.0

🔥 Key Takeaways
✔️ Use sum() and len() for simplicity

✔️ Average = total / count

✔️ Loops help build logic

✔️ Handle empty list to avoid division error