// OUTSIDE SCOPE: global
// variable declaration
extern int x;
extern char y[];
extern float z;
extern double a; // double size of float
// INSIDE SCOPE: local
// variable definition
int x;
// variable definition and initialisation
char y[] = "String"; // String
float z = 1.05; // 1.050000
double a = 12.5; // 12.500000
// variable initialisation
x = 6;
// multiple variable definition
int c, d;
// multiple variable initialisation
c = d = 6; // 6, 6