Program to find diameter with the given radius of a circle.
Given the radius of a circle, write a program to find the diameter of a circle.
Examples:
Input: r=4
Output: 8Input: r=5
Output:10
Approach:
The diameter of a circle is simply twice the radius.
Here’s how you could express this formula in a mathematical sense:
D= 2* r
r is radius and D is diameter of a circle
Below is the implementation of the code:
C++
#include <iostream> using namespace std; int main() { int radius = 4, diameter; // Get user input for the radius cout << "The Given radius of the circle is: " << radius << endl; // Calculate the diameter using the formula: diameter = // 2 * radius diameter = 2 * radius; // Display the result cout << "The diameter of the circle is : " << diameter << endl; return 0; } |
Java
import java.util.Scanner; public class CircleDiameter { public static void main(String[] args) { Scanner scanner = new Scanner(System.in); int radius = 4 ; int diameter; // Display the given radius of the circle System.out.println( "The Given radius of the circle is: " + radius); // Calculate the diameter using the formula: diameter = 2 * radius diameter = 2 * radius; // Display the result System.out.println( "The diameter of the circle is: " + diameter); scanner.close(); } } |
Python3
# Get the radius of the circle radius = 4 # Display the given radius of the circle print ( "The Given radius of the circle is:" , radius) # Calculate the diameter using the formula: diameter = 2 * radius diameter = 2 * radius # Display the result print ( "The diameter of the circle is:" , diameter) |
C#
using System; public class GFG { static public void Main() { int radius = 4, diameter; // Get user input for the radius Console.WriteLine( "The Given radius of the circle is: " + radius); // Calculate the diameter using the formula: // diameter = 2 * radius diameter = 2 * radius; // Display the result Console.WriteLine( "The diameter of the circle is : " + diameter); } } |
Javascript
let radius = 4; let diameter; // Display the given radius // of the circle console.log( "The Given radius of the circle is: " + radius); // Calculate the diameter using // the formula: diameter = 2 * radius diameter = 2 * radius; // Display the calculated diameter console.log( "The diameter of the circle is : " + diameter); |
Output
The Given radius of the circle is: 4 The diameter of the circle is : 8
Time Complexity: O(1), since there is one multiplication operation which takes constant time.
Auxiliary Space: O(1), since no extra space has been taken.
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