Program to Convert Radian to Degree

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 conversion
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 conversion
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 conversion
    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 conversion
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 conversion
    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 conversion
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 conversion
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

286.479

Time Complexity: O(1), as we are not using any loops.

Auxiliary Space: O(1), as we are not using any extra space.

Example :

The following program demonstrates toDegree() and toRadians() .

Java

// Demonstrate toDegree and toRadians():

class GFG{
public static void main(String args[]){
double theta = 120.0;

  // degree --> radians
  System.out.println(theta+ " degree is "+ Math.toRadians(theta)+ " radians.");

  theta =1.312;
  // radians --> degrees
   System.out.println(theta+ " radians is "+ Math.toDegrees(theta)+ " degrees.");
}
}

Python3

# Demonstrate toDegree and toRadians():

import math

theta = 120.0;

#degree --> radians
print(theta, "degree is", math.radians(theta), "radians.");

theta =1.312;
#radians --> degrees
print(theta, "radians is ",  math.degrees(theta), "degrees.");


# This code is contributed by phasing17

Output

120.0 degree is 2.0943951023931953 radians.
1.312 radians is 75.17206272116401 degrees.

Time Complexity: O(1), as it is using constant operations

Auxiliary Space: O(1), as it is using constant variables

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