Operators

C++ provides a rich operator environment. An operator is a symbol that tells the compiler to perform a specific mathematical or logical manipulation.

  • Arithmetic Operators
  • Relational  Operators
  • Logical Operators
  • Assignment Operators
  • Compound Assignments

Arithmetic Operators

C++ defines the following arithmetic operators:

Operator Description
+ Addition
- Subtraction
* Multiplication
/ Division
% Modulus
++ Increment
-- Decrement

 

Relational  Operators

Relational operators evaluate values on the left and right side of the operator and return the relation as either True or False.

Operator Description
== is equal to
< is less than
> is greater than
<= is less than or equal to
>= is greater than or equal to
!= is not equal to

 

Logical Operators

The logical operators are used to support the basic logical operations AND, OR, and NOT.

Operator Description
&& AND
|| OR
! NOT

 

Assignment Operators

These operators are useful when assigning values to variables.

var = expression;

int x, y, z;
x = y = z = 100; // set x, y, and z to 100

 

Compound Assignments

C++ provides special compound assignment operators that simplify the coding of certain assignment statements. Let’s begin with an example.

The assignment statement shown here:

x = x + 10;

//can be written using a compound assignment as

 x += 10;