Java Part 2: Syntax - Decleration and assignment

(Page 2 of 8 )

Java variables are declared in exactly the same way as in both C and C++. Let's declare a variable of type int and then set it to a value:

int val;

val = 1;

This decleration could be shorted to just one line of code, like this:

int val = 1;

Addition and Subtraction

The standard C incremetor function ++, or -- for decrementing a variable still holds in Java. For example:

int val = 1;

val = val + 1; // val is now 2

Further, we can simplify the second line even more:

val++;

This works the same for decrementing. These two operators for incrementing and decrementing are known as unary operators because they only require one argument.

Multiplication and Division

To multiply a variable by a numerical value, we use the * operator, like this:

val = val * 10; // Multiply val by 10

We can also multiply a variable by a number like this:

val *= 10; // Same as val = val * 10

Multiplying one variable by another is also simple:

var = var * par;

OR

var *= par;

Division follows exactly the same principles as addition, subtraction and multiply:

val = val / 50;

OR

val /= 50;

Also, dividing one value by another is easily accomplished:

val = val / par; // Same as val = val / par

OR

val /= par; // Same as val = val / par

Next: Making code more readable >>
 

More Java Articles
More By Chris Noack

Comments On: Java Part 2: Syntax

>>> Be the FIRST to comment on this article!