Find Average of N Numbers in Python

What You’ll Learn

The arithmetic mean of N numbers is their sum divided by N. This tutorial covers the formula, a live preview, algorithm steps, worked Python examples, edge cases, and complexity.

📝 Problem & Approach

Given N positive count and N numeric values, compute their arithmetic mean.

# Example: 1, 2, 3, 4, 5
# Sum = 15, N = 5
# Average = 15 / 5 = 3.0

Inputs & Outputs

Minimal workflow

function averageOfN(n):
    if n <= 0:
        return error
    sum = 0
    repeat n times:
        read x
        sum = sum + x
    return sum / n

Method comparison

🔮 Live Preview

Enter comma-separated numbers and view count, sum, and average.

Press "Run" to see results.

Examples Gallery

Three complete Python programs — input loop, list helper, and statistics.mean. Click View Output to reveal sample console results.

def average_of_n_numbers(n: int) -> float:
    if n <= 0:
        return 0.0

    total = 0.0
    print(f"Enter {n} numbers:")
    for _ in range(n):
        value = float(input())
        total += value

    return total / n


n = 5
result = average_of_n_numbers(n)
print(f"The average of the entered numbers is: {result:.6f}")

Enter 5 numbers:
1
2
3
4
5
The average of the entered numbers is: 3.000000

def average_from_list(values: list[float]) -> float:
    if not values:
        return 0.0
    return sum(values) / len(values)


data = [10, 15, 20, 25, 30]
avg = average_from_list(data)
print(f"Average = {avg:.6f}")

Average = 20.000000

from statistics import mean


data = [1, 2, 3, 4, 5]
print(mean(data))

3

🔎 Worked Walkthrough — 1, 2, 3, 4, 5

Trace a running-sum loop for five values. Start with total = 0.0 and N = 5.

Final mean: 15.0 / 5 = 3.0.

⚖️ Facts Worth Knowing

Handy follow-ups interviewers sometimes ask.

🎯 Practice Problems

Try these variations to lock in the pattern.

Notes

⏱️ Time and Space Complexity

💡 Best Practices