1. Python

Python Program to Find Circumference of Circle

Circumference of a circle is defined as length of perimeter of circle. Mathematically, circumference of a circle having radius r will be 2πr. Quite simeple, so we need to just code this simple mathematical formula as Python Code.
Python Code for Finding Circumference of Circle

# Calculate circumference of a Circle

# Importing Python's Math Module
import math

# Using value of pie inside math inside
π = math.tau

# Ask user for radius of circle
radius = float(input("Enter radius of circle => "))

# Circumference of circle = 2πr
circumference = 2 * π * radius

# Printing out circumference of circle
print("Circumference of circle is => ", circumference)

Output of Above Code

Enter radius of circle => 5
Circumference of circle is =>  62.83185307179586
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