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Program to Convert Radian to Degree

  • Last Updated : 26 May, 2021
Geek Week

Before moving to the actual solution, let’s try to find out what is a degree, a radian, and their relations.

Radian : The radian is the standard unit of angular measure, used in many areas of mathematics. The length of an arc of a unit circle is numerically equal to the measurement in radians of the angle that it subtends. One radian is just under 57.3 degrees.

Degree : A degree (in full, a degree of arc, arc degree, or arcdegree), usually denoted by ° (the degree symbol), is a measurement of a plane angle, defined so that a full rotation is 360 degrees.
The relation 2pi*rad = 360° can be derived using the formula for arc length

An arc of a circle with the same length as the radius of that circle subtends an angle of 1 radian. The circumference subtends an angle of 2pi radians. 

Therefore the formula is: 



degree = radian * (180/pi)
where, pi = 22/7

Examples:  

Input : radian = 20
Output : degree = 1145.4545454545455
Explanation: degree = 20 * (180/pi)

Input : radian = 5
Output : degree = 286.3636363636364
Explanation : degree = 20 * (180/pi)

Note: In this programs, we have taken the value of pi as 3.14159 to get standard result in all three languages.  

C++




// C++ code to convert radian to degree
#include <iostream>
using namespace std;
 
// Function for convertion
double Convert(double radian)
{
    double pi = 3.14159;
    return(radian * (180 / pi));
}
 
// Driver code
int main()
{
    double radian = 5.0;
    double degree = Convert(radian);
     
    cout << degree;
    return 0;
}
 
// This code is contributed by Khushboogoyal499

C




// C code to convert radian to degree
 
#include <stdio.h>
 
// Function for convertion
double Convert(double radian){
    double pi = 3.14159;
    return(radian * (180/pi));
}
 
// Driver Code
int main(){
    double radian = 5.0;
    double degree = Convert(radian);
    printf("%.5lf", degree);
    return 0;
}

Java




// Java code to convert radian to degree
 
import java.io.*;
class GFG {
    // Function for convertion
    static double Convert(double radian){
        double pi = 3.14159;
        return(radian * (180/pi));
    }
    // Driver Code
    public static void main (String[] args) {
        double radian = 5.0;
        double degree = Convert(radian);
        System.out.println("degree = "+ degree);
    }
}

Python3




# Python code to convert radian to degree
 
# Function for convertion
def Convert(radian):
    pi = 3.14159
    # Simply used the formula
    degree = radian * (180/pi)
    return degree
 
# Driver Code
radian = 5
print("degree =",(Convert(radian)))

C#




// C# code to convert radian to degree.
using System;
 
class GFG {
 
    // Function for convertion
    static double Convert(double radian){
        double pi = 3.14159;
        return(radian * (180 / pi));
    }
 
    // Driver Code
    public static void Main () {
        double radian = 5.0;
        double degree = Convert(radian);
        Console.Write("degree = " + degree);
    }
}
 
// This code is contributed by Nitin Mittal.

PHP




<?php
// PHP code to convert radian to degree
 
// Function for convertion
function Convert($radian)
{
    $pi = 3.14159;
    return($radian * (180 / $pi));
}
 
// Driver Code
$radian = 5.0;
$degree = Convert($radian);
echo( $degree);
 
// This code is contributed by nitin mittal
?>

Javascript




<script>
 
// Javascript code to convert radian to degree
 
// Function for convertion
function Convert(radian){
    let pi = 3.14159;
    return(radian * (180/pi));
}
 
// Driver Code
  
    let radian = 5.0;
    let degree = Convert(radian);
    document.write(degree);
 
 
// This code is contributed Mayank Tyagi
 
</script>

Output :  

286.47914

Reference: 
https://en.wikipedia.org/wiki/Radian 
https://en.wikipedia.org/wiki/Degree_(angle)
 

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