update

tutorial/CalSumOfGeo.java

@@ -8,10 +8,9 @@ import java.util.Scanner;
 public class CalSumOfGeo {
     public static void main(String[] args){
         double a, R, n;
+        double sumOfGeo;
         Scanner input = new Scanner(System.in);
     
-    double sumofGS;
-    
     System.out.print("Enter the first number of the sequence: ");
         a = input.nextDouble();
     
@@ -21,10 +20,10 @@ public class CalSumOfGeo {
     System.out.print("Enter the number of the terms of the sequence: ");
         n = input.nextDouble();
     
-    sumofGS = (a*(Math.pow(R,n)-1))/(R-1);
+    sumOfGeo = (a*(Math.pow(R,n)-1))/(R-1);
     
     System.out.print("The sum of Geometric Series: ");
-    System.out.printf("%1.1f\n" , sumofGS);
+    System.out.printf("%1.1f\n" , sumOfGeo);
                 
     }
 }

tutorial/CalVolOfCylinder.java

@@ -0,0 +1,27 @@
+package tutorial;
+
+import java.util.Scanner;
+
+public class CalVolOfCylinder {
+    
+    public static void main (String [] args)
+    {
+        String strRadius , strLength;
+        double radius , length, volume;
+        Scanner input = new Scanner(System.in);
+
+        System.out.print("Enter the radius: ");
+        strRadius = input.nextLine();
+
+        System.out.print("Enter the length: ");
+        strLength = input.nextLine();
+        
+        radius = Double.parseDouble(strRadius);
+        length = Double.parseDouble(strLength);
+        
+        volume = Math.pow(radius,2) * Math.PI * length;
+        System.out.println("The volume of the cylinder with radius= " + radius + " and length= " + length + " is " + volume + ".");
+        
+    }
+    
+}