Update README.md

Author: jfullstackdev

README.md

@@ -1,19 +1,20 @@
 # Core Concepts of Computer Programming 
 
 Table of Contents
-1. Input / Output
+1. Intro
+2. Input / Output
     1. Hello World Program
-2. Variables & Data Types
+3. Variables & Data Types
     1. Sample Program for Variables and Data Types
-3. Operators
+4. Operators
     1. Assignment Operators Sample Program
     2. Arithmetic Operators Sample Program
     3. Comparison Operators Sample Program
-4. Conditionals
+5. Conditionals
     1. Sample Program Using IF
     2. Sample Program Using IF/ELSE
-5. Functions
-6. Sample Program Creating And Using Functions
+6. Functions
+7. Sample Program Creating And Using Functions
 
 ## Intro
 Of all the inventions in the field of electronics