1 files changed, 18 insertions, 0 deletions
diff --git a/src/se/liu/gusso230/lab1/Exercise9.java b/src/se/liu/gusso230/lab1/Exercise9.java
new file mode 100644
index 0000000..a8809a8
--- /dev/null
+++ b/src/se/liu/gusso230/lab1/Exercise9.java
@@ -0,0 +1,18 @@
+package se.liu.gusso230.lab1;
+
+import javax.swing.*;
+
+public class Exercise9 {
+    public static void main(String[] args) {
+        String input = JOptionPane.showInputDialog("Please input a value");
+	System.out.println("sqrt (" + input + ") ~= " + findRoot(Double.parseDouble(input)));
+    }
+
+    public static double findRoot(double d) {
+        double guess = d;
+        for (int i = 0; i < 10; i++) {
+            guess -= (guess * guess - d) / (2 * guess);
+        }
+        return guess;
+    }
+}