/* Depending on what variables you want to declare */
String hello = "hello"; //characters
short one = 12;//shorter integers
int two = 2000; //complete integer up too 32 bits
long number = 2000000; //complete integer up to 64 bits
float decimal = 1.512 //up to 7 decimal digits
double million = 1.387892847395 //up tp 16 decmial digits
Bool condition = true; // true or false
char a = "a"; // unicode character

java decleration
float simpleInterest; //Declaring float variable

// Variable declaration and assignment
int myVariable = 10;
String myString = "Hello, World!";
boolean myBool = true;
double myDouble = 3.14;
// Variable usage
System.out.println(myVariable);
System.out.println(myString);
System.out.println(myBool);
System.out.println(myDouble);

class HelloWorld { public static void main(String[] args) {
String a = "aaaa";
int num = 123;
final String cons = "I am constant";
System.out.print(a);
System.out.print(num);
System.out.print(cons); }
}

int speedLimit = 80;

int myVariable = 42; //This is the most commonly used variable. Only use other variables if you have a good reason to.