Added program to find CSA of cylinder

Java/Program-16/CSAOfCylinder.java

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+package com.dsa;
+
+import java.util.Scanner;
+
+public class CSAOfCylinder {
+    public static void main(String[] args) {
+        Scanner input=new Scanner(System.in);
+        System.out.println("Enter radius and height of cylinder");
+        float radius=input.nextFloat();
+        float height=input.nextFloat();
+        float CSA=2*3.14f*radius*height;
+        System.out.println("Curved surface area of cylinder is "+CSA+" square units");
+    }
+}

Java/Program-16/README.md

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+Program 16
+
+Program to find CSA of Cylinder

Java/Program-17/ReverseString.java

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+package com.dsa;
+
+import java.util.Scanner;
+
+public class ReverseString {
+    public static void main(String[] args) {
+        Scanner input=new Scanner(System.in);
+        String reversed_string="";
+        System.out.println("Enter the string");
+        String string= input.next();
+        for(int i=string.length()-1;i>=0;i--){
+            reversed_string = reversed_string + string.charAt(i);
+        }
+        System.out.println("The original string is "+string);
+        System.out.println("The reversed string is "+reversed_string);
+    }
+}

Java/Program-17/readme.md

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+Program 17 
+
+Program to reverse a given string

Java/Readme.md

@@ -17,6 +17,13 @@
 | [Program-11](https://github.com/swaaz/basicprograms/blob/814a1e60ae23d81158d8174666f23c9b7419e15e/Java/Program-11/Program.java) | Program for compound interest
 | [Program-12](https://github.com/swaaz/basicprograms/blob/814a1e60ae23d81158d8174666f23c9b7419e15e/Java/Program-12/Program-12.java) | Print number of vowels and consonants in a string
 | [Program-13](https://github.com/swaaz/basicprograms/blob/814a1e60ae23d81158d8174666f23c9b7419e15e/Java/Program-13/Program%20Number%20to%20Word.java) | Program to convert number into words
+| [Program-14](https://github.com/swaaz/basicprograms/blob/814a1e60ae23d81158d8174666f23c9b7419e15e/Java/Program-14/Program%20Number%20to%20Word.java) | Program to convert decimal to binary
+| [Program-15](https://github.com/swaaz/basicprograms/blob/814a1e60ae23d81158d8174666f23c9b7419e15e/Java/Program-15/Program%20Number%20to%20Word.java) | Program to convert decimal number to equivalenr binary number
+| [Program-16](https://github.com/swaaz/basicprograms/blob/814a1e60ae23d81158d8174666f23c9b7419e15e/Java/Program-16/Program%20Number%20to%20Word.java) | Program to find CSA of cylinder
+| [Program-17](https://github.com/swaaz/basicprograms/blob/814a1e60ae23d81158d8174666f23c9b7419e15e/Java/Program-17/Program%20Number%20to%20Word.java) | Program to reverse a given string
+| [Program-18](https://github.com/swaaz/basicprograms/blob/814a1e60ae23d81158d8174666f23c9b7419e15e/Java/Program-18/Program%20Number%20to%20Word.java) | Program to calculate electricity bill
+| [Program-19](https://github.com/swaaz/basicprograms/blob/814a1e60ae23d81158d8174666f23c9b7419e15e/Java/Program-19/Program%20Number%20to%20Word.java) | Program to calculate discount
+| [Program-20](https://github.com/swaaz/basicprograms/blob/814a1e60ae23d81158d8174666f23c9b7419e15e/Java/Program-20/Program%20Number%20to%20Word.java) | Program to calculate batting average
 
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