first commit

a.java

@@ -0,0 +1,25 @@
+package eµÄx´Î·½;
+public class power{
+
+public static int factorial(int n){
+		int factorial=1;
+		int counter=1;
+		while (counter<1+n){
+			factorial*=counter+1;
+			counter++;
+		}
+		return factorial;
+	}	
+public static double ex(int n,int x){
+	double ex=1.0;
+	int counter=1;
+	while (counter<=n){
+		ex+=(double)Math.pow(x,counter)/factorial(counter);
+		counter++;
+	}
+	return ex;
+}	
+
+
+
+}