Update README.md

Author: uiuxarghya

README.md

@@ -1 +1,29 @@
-# hello_world
+## Hello World
+# Program to print Hello World in Java
+
+Here we will see the basic syntax of a java program In the first program we print `Hello Wolrd`.
+
+## Input
+
+
+```java
+//Program to print Hello World
+
+class HelloWorld 
+{ //start of class
+
+   public static void main(String[] args) 
+   
+    { //start of main() method
+    
+        System.out.println("Hello, World!");//printing Hello World
+        
+    } //end of main() method
+    
+} //end of the class
+```
+## Output
+
+```
+Hello World!
+```