short       -32.000   +32.000
	int         -2.1 bio  +2.1 bio
	long int    -2.1      +2.1 bio
	 
	float       10^(-38)  10^(+38)   7 digits
	double      10^(-308) 10^(+308)  15 digits
	
	char        'a' 'b' 'c' '0' 

        bool        true false