This is my first post about Java programming language, I'll start this post with variables and how to declare them.

int i;
int i,j,k;
int m = 1, s = 2, k = 40;

float r;
double w = 2.5;

String myString = "Hello";
String mySt = 'This is wrong'; // Wrong declaration of String ... it should be with double qoute