Answer 1

Java:

DataTypes/

Primitive. Non-Primitive.
int. Arrays
boolean. Strings
float. Self. defined Objects
double. etc...
long
short
bye
char

q)
Is there a way to tell if a data type is non-primitive?
Yea, look at the capitol letters 😜. (is the first letter in caps?)

Constants are variables that cannot change in value once defined. Denoted with the keyword 'final'.

Ex/
final float PI = 3.14;

This is a constant. Now it is impossible to change its value.

Ex/
final float PI = 3.14;
PI = 3.1415; // ERROR

decimals:
double > float

Whole numbers:
long > int > short > byte

True or false:
boolean

Character:
char
Denoted ' '

Ex/
char a = 'a';

Bunch of characters:
String
Denoted " "

Ex/
String word = "hello";