Java Operators and Concatenation

An operator is a symbol that tells the computer to perform a vertain mathematical or logical manipulation. Values used by an operator are known as operands.

There’re arithmetic and comparison operators.

Integer Arithmetic Operators	Description	Example
+	Addition	1 + 2 = 3
-	Subtraction	12 – 2 = 10
*	Multiplication	10 * 3 = 30
/	Division	100 / 4 = 25
%	Modulus (Reminder)	3 % 2 = 1

Comparison Operators	Description	Example
		Returns True	Returns False
<	Less than	2 <>	100 <>
>	Greater than	500 > 1	1 > 500
==	Equal to	1 == 1	1 == 2
<=	Less than or equal	1 <= 1 , 0.5 <= 1	2 <= 1
>=	Greater than or equal	50 >= 50 , 100 >= 50	1 >= 2
!=	Not equal	1 != 2	1 != 1

Other than this “=” operator known as assignment operator. It can be used within mathematical sums and also to assign values to variables.

Escape sequence

You can use escape sequences within literal strings to format text.

Escape Sequence	Description
\b	Back Space
\t	Tab
\n	New Line or line feed
\f	Form feed
\r	Carriage return
\”	Double quotation mark
\’	Single quotation mark
\\	Backslash

Increment, Decrement operators

You can use operators like +, - as follows.

Ex:

++ adds one to value in variable x. And then print it (Prefix).

Ex:

Computer prints the value in x and then adds 1 to value in x (Postfix).

You can use -- same way.

Concatenation

Joining strings with other data types within a single statement is known as: Concatenation”.

Ex:

‘+’ sign is also known as “Concatenating operator”. Above example concatenate a literal string “Value in x is:” with value in x which is an integer.