A variable declaration statement starts with a data type keyword (e.g.
int, string etc) followed
by a comma separated list of variable names and optional initializations,
terminated by a semicolon.
Example 5.1. Variable Declarations
int i; // Declare an integer variable
int i, j, k; // Declare three integers
int i = 7; // Declare and initialize
int i, j = 8; // Declare two integers, initialize j.