Java program for convert Angle from degree to radian

Question

https://code.sololearn.com/cC62uSJgtqcf/?ref=app

I want a program like this: 1. Ask the user to enter the angle in degrees, 2. Converts the angle from degrees to radians, the output will be as follows:

Insert the angle in degree
100
It’s equal to: 1.4753293 radian

Please make it as a full code

And question:

What is the mathematical method that calculates pi?

Answer 1

import java.util.Scanner;
import java.lang.Math;

public class Program
{
public static void main(String[] args){
Scanner sc = new Scanner(System.in);
System.out.println("Enter Angle");
int a = sc.nextInt();
double rad = (a * Math.PI)/180;
System.out.println(rad);
}

}

In your code, you forgot the main. The class Math gives us an approximation of pi -> Math.PI.

Answer 2

There are already built-in methods in the Math class that will convert degrees to radians and vice-versa.
Math.toRadians(degrees)
Math.toDegrees(radians)
Each method will take in the argument as a double and returns a double.

import java.util.Scanner;

public class Program {
public static void main(String[] args) {
System.out.println("Enter angle:");
Scanner sc = new Scanner(System.in);
double deg = sc.nextDouble();
double rad = Math.toRadians(deg);
System.out.println(rad);
}
}

FYI, you don't need to import Math. java.lang.* is automatically imported by default.