Java Variables

int SomeIntegerNumber = 5; // This creates an integer variable called SomeIntegerNumber and assigns it the number 5.
                           // Variables of type int when not assigned a value gets a default, in Java would be 0.

int SomeIntegerNumber2; // This creates an integer variable but doesn't have an initial value and so is assigned 0.
SomeIntegerNumber2 = 5; // Here the variable SomeIntegerNumber2 is assigned a value of 5 overwriting its value of 0.

int SomeIntegerNumber3 = 5 + 3; // This creates an integer variable with an operator.
                                // The expression will be evaluated, 8 is then assigned to SomeIntegerNumber3.

String SomeText = "Hello World"; // This creates a String variable and stores the Text "Hello World".

double Pi = 3.1415926535; // This creates a double variable, which can be used to store numbers with decimal values.
                          // The variable is assigned the first few digits of the constant Pi (3.1415926535).