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

Input:degree = 45Output:radian = 0.785398Input:degree = 58Output: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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