Add files via upload

MainPi.java

@@ -0,0 +1,40 @@
+package pi;
+
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStreamReader;
+
+public class MainPi {
+
+	public static void main(String[] args) throws NumberFormatException, IOException {
+
+		/*manual precision*/
+		BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
+		System.out.print("Enter number of time to do the sum: ");
+		long nbRepetition = Long.parseLong(reader.readLine());
+
+		/*Max precision:*/
+		//long nbRepetition = Long.MAX_VALUE;
+
+
+
+		//the taylor series
+		Double pi = 0.0 , temp = 0.0 ;
+		for(long i = 0; i < nbRepetition; i++) {
+			//temporary variable
+			temp = (Math.pow((-1), i)) / ((2*i)+1);
+			//add previous temporary variable to actual sum
+			pi = pi + temp;
+		}
+		// ***4*** arctanx  x = 1 = Pi
+		pi = pi*4.0;
+
+
+
+		//print
+		System.out.println("\n\nAproximation de Pi: \n\n" + pi);
+
+		//difference with Pi from Eclipse -- Math.PI
+		System.out.println(pi - Math.PI);
+	}
+}