Program to convert Degree to Radian

Last Updated : 26 Feb, 2021

Given the angle in degree, the task is to convert this into radians.
Examples:

Input: degree = 45 
Output: radian = 0.785398

Input: degree = 58
Output: radian = 1.01229

Approach:
Radian: The Radian is the SI unit for measuring angles, used mainly in trigonometry. A radian is defined by an arc of a circle. A full circle is just over 6 radians (Roughly 6.28). One radian is just under 57.3 degrees.
Degree: A degree, usually denoted by ° (the degree symbol), is a measurement of a plane angle, defined so that a full rotation is 360 degrees. Because a full rotation equals 2*pi radians, one degree is equivalent to pi/180 radians.
The formula to convert radian to degree is:

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

Below is the implementation of the above approach:

C++

// C++ program to convert degree to radian
 
#include <iostream>
#include <math.h>
using namespace std;
 
// Function for conversion
double Convert(double degree)
{
    double pi = 3.14159265359;
    return (degree * (pi / 180));
}
 
// Driver code
int main()
{
    double degree = 30;
    double radian = Convert(degree);
    cout << radian;
    return 0;
}

Java

// Java program to convert degree to radian
import java.io.*;
import java.util.*;
 
class GFG {
     
// Function for conversion
static double Convert(double degree)
{
    double pi = 3.14159265359;
     
    return (degree * (pi / 180));
}
 
// Driver code
public static void main(String[] args)
{
    double degree = 30;
    double radian = Convert(degree);
     
    System.out.printf("%.6f", radian);
}
}
 
// This code is contributed by coder001   

Python3

# Python3 program to convert degree to radian
 
# Function for conversion
def Convert(degree):
 
    pi = 3.14159265359;
    return (degree * (pi / 180));
 
# Driver code
degree = 30;
radian = Convert(degree);
print(radian);
 
# This code is contributed by Code_Mech

C#

// C# program to convert degree to radian
using System;
 
class GFG{
     
// Function for conversion
static double Convert(double degree)
{
    double pi = 3.14159265359;
     
    return (degree * (pi / 180));
}
 
// Driver code
public static void Main()
{
    double degree = 30;
    double radian = Convert(degree);
     
    Console.Write("{0:F6}", radian);
}
}
 
// This code is contributed by Code_Mech

Javascript

<script>
 
// Javascript program to convert degree to radian
 
// Function for conversion
function Convert(degree)
{
    let pi = 3.14159265359;
    return (degree * (pi / 180));
}
 
// Driver code
 
    let degree = 30;
    let radian = Convert(degree);
    document.write(radian);
 
 
// This code is contributed Mayank Tyagi
 
</script>

Output:

0.523599

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Program to convert Degree to Radian

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