DataTypes.java

// Data types -> are of primitive and non-primitive

//primitive -> has four categories(general),
// int - natural numbers, whole numbers
// inside int we have byte, short, int, long

// float - point values 
// in float we have, double

// these two are also called as number types



// characters - characters
// boolean - true and false

class DataTypes{
    public static void main(String args[]){
        // int k= 9;
        // // byte by = 129; does not work
        // byte by =127;
        // short sh = 558;
        // long l = 58854l;
        // // float f= 5.8;
        // float f = 5.8f;
        
        // char c = 'k';
        
        // boolean b = true;
        
    }

}

// integer will have different sizes, in general we store in it 

// integer -> int -< 4 bytes >-
// integer -> long -< 8 bytes >-
// integer -> short -< 2 bytes >-
// integer -> byte -< 1 byte >-

// // how do we calculate range is 
// byte -1 byte -> -2raispower7 to 2raispower7 -1
// thats what we go -> -128 to 127


// float - 4 bytes
// double - 8 bytes (by default in java, greater range)
// double num = 5.6;
// float num = 5.6; // error its double
// float num = 5.6f // now no error this is float 

// characters - 2 bytes here 
// UNICODE - java , other languages (ASCII)
// char c = 'a'; // use single quotes for characters 


// Boolean -> true or false
// bool b = false;
// bool b = true;


// later we see non-primitve data types