Operators and Expressions

1. Arithmetic Operators

Used for basic math operations.

Operator	Description	Example
+	Addition	a + b
-	Subtraction	a - b
*	Multiplication	a * b
/	Division	a / b
%	Modulus (remainder)	a % b

2. Relational / Comparison Operators

Used to compare values.

Operator	Description	Example	Result
==	Equal to	a == b	true/false
!=	Not equal to	a != b	true/false
>	Greater than	a > b	true/false
<	Less than	a < b	true/false
>=	Greater or equal	a >= b	true/false
<=	Less or equal	a <= b	true/false

3. Logical Operators

Used to combine multiple conditions.

Operator	Description	Example
&&	Logical AND	a > 0 && b < 10
\|\|	Logical OR	a > 0 \|\| b < 10
!	Logical NOT	!(a > 0)

4. Assignment Operators

Used to assign values.

Operator	Example	Equivalent
=	a = b	assign b to a
+=	a += b	a = a + b
-=	a -= b	a = a - b
*=	a *= b	a = a * b
/=	a /= b	a = a / b
%=	a %= b	a = a % b

🔹 5. Unary Operators Operate on a single operand.

Operator	Description	Example
+	Unary plus	+a
-	Unary minus	-a
++	Increment	a++ or ++a
--	Decrement	a-- or --a
!	Logical NOT	!true

6. Ternary Operator (? Operator)

A shorthand for if-else.

int max = (a > b) ? a : b;

Code Demo

public class OperatorDemo {
    public static void main(String[] args) {
        int a = 10, b = 3;

        // Arithmetic
        System.out.println("Sum: " + (a + b));
        System.out.println("Remainder: " + (a % b));

        // Comparison
        System.out.println("a > b? " + (a > b));

        // Logical
        boolean result = (a > 5) && (b < 5);
        System.out.println("Logical AND: " + result);

        // Assignment
        int c = 5;
        c += 3; // same as c = c + 3
        System.out.println("After += : " + c);

        // Ternary
        int max = (a > b) ? a : b;
        System.out.println("Max: " + max);
    }
}

Output:

Sum: 13
Remainder: 1
a > b? true
Logical AND: true
After += : 8
Max: 10