R Program to Calculate Area of a Circle

Author:

1. Introduction

A circle is one of the fundamental shapes in geometry. The area of a circle is given by the formula: ( A = pi r^2 \), where r stands for the radius of the circle. 

Computing the area of a circle is a foundational concept in math and has various applications in science and engineering. This article will guide you on how to design an R program that calculates the area of a circle given its radius.

2. Program Overview

The program will prompt the user to input the radius of the circle. It will then compute the area using the formula mentioned and display the result to the user.

3. Code Program

# Define the value of Pi
pi <- 3.141592653589793

# Prompt the user to enter the radius of the circle
cat("Enter the radius of the circle: ")
radius <- as.numeric(readLines(n=1))

# Calculate the area of the circle
area <- pi * radius^2

# Display the computed area to the user
cat("The area of the circle with radius", radius, "is:", area, "\n")

Output:

Enter the radius of the circle: 5
The area of the circle with radius 5 is: 78.5398163397448

4. Step By Step Explanation

1. Our program commences by defining the value of pi. Though there are various ways to determine the value of pi in R, for simplicity, we've defined it as a constant with its generally accepted value.

2. The user is prompted to provide the radius of the circle using the cat function.

3. The readLines(n=1) function is employed to capture the user's input, which is then converted into a numeric value using as.numeric and stored in the radius variable.

4. Following the acquisition of the radius, the program computes the area of the circle using the formula ( A = pi r^2 \). This calculated value is saved in the area variable.

5. Finally, the program leverages the cat function to present the calculated area of the circle to the user.

Related R Programs with Output and Step-By-Step Explanation:

R Program to Print Hello World R Program to Add Two Numbers R Program to Subtract Two Numbers R Program to Multiply Two Numbers R Program to Divide Two Numbers R Program to Calculate Remainder R Program to Check if a Number is Even or Odd R Program to Find Maximum of Two Numbers R Program to Find Minimum of Two Numbers R Program to Calculate Factorial of a Number R Program to Print Fibonacci Sequence R Program to Check Prime Number R Program to Calculate the Area of a Circle R Program to Calculate the Area of a Rectangle R Program to Calculate the Area of a Triangle R Program to Convert Celsius to Fahrenheit R Program to Convert Fahrenheit to Celsius R Program to Find Roots of Quadratic Equation R Program to Perform Matrix Multiplication Steps to Run R Program in RStudio R Program to Reverse a String R Program to Calculate String Length R Program to Count Vowels and Consonants in a String R Program to Find the Largest Element in a Vector R Program to Sort Elements of a Vector R Program to Implement Bubble Sort R Program to Implement Selection Sort R Program to Implement Insertion Sort R Program to Search an Element in a Vector using Binary Search R Program to Calculate Standard Deviation R Program to Generate Random Numbers R Program to Perform Linear Regression R Program to Create a Histogram R Program to Create a Boxplot R Program to Create a Scatterplot R Program to Perform String Concatenation R Program to Replace Substring in a String R Program to Split a String into Words R Program to Convert Uppercase to Lowercase R Program to Convert Lowercase to Uppercase R Program to Implement Simple Calculator R Program to Calculate Power of a Number R Program to Check if a Number is Positive, Negative or Zero R Program to Generate Prime Numbers up to N R Program to Check for Armstrong Number R Program to Find GCD of Two Numbers R Program to Find LCM of Two Numbers R Program to Display Date and Time R Program to Get Input from User R Program to Concatenate Two Vectors R Program to Check if an Element Exists in a Vector R Program to Remove Duplicates from a Vector R Program to Implement Stack R Program to Implement Queue R Program to Find Sum of Vector Elements R Program to Merge Two Dataframes R Program to Rename Columns in a Dataframe R Program to Add Rows to a Dataframe R Program to Add Columns to a Dataframe R Program to Drop Rows from a Dataframe R Program to Drop Columns from a Dataframe R Program to Convert a List to a Vector R Program to Convert a Vector to a List

Comments

Post a Comment

Leave Comment