C++ Assignment Operators

C++ provides several Assignment Operators to change the value of a variable. These operators are used to modify the value of the left-hand side operand with the value of the right-hand side operand. The assignment operator = is the most commonly used assignment operator in C++.

Table of Assignment Operators

The table below shows the different assignment operators available in C++

Operator	Name	Description	Example
=	Simple Assignment	Assigns the value of the right operand to the left operand	a = 7
+=	Add and Assignment	Adds the right operand to the left operand and assigns the result to the left operand	a += 7 (equivalent to a = a + 7)
-=	Subtract and Assignment	Subtracts the right operand from the left operand and assigns the result to the left operand	a -= 7 (equivalent to a = a - 7)
*=	Multiply and Assignment	Multiplies the right operand with the left operand and assigns the result to the left operand	a *= 7 (equivalent to a = a * 7)
/=	Divide and Assignment	Divides the left operand by the right operand and assigns the result to the left operand	a /= 7 (equivalent to a = a / 7)
%=	Modulo and Assignment	Takes the modulo of the left operand by the right operand and assigns the result to the left operand	a %= 7 (equivalent to a = a % 7)

Example of Assignment Operators

1#include <iostream>
2
3int main() {
4  int a = 5;
5  int b = 2;
6
7  // Simple Assignment
8  a = b;
9  std::cout << "a = " << a << std::endl; // Outputs: a = 2
10
11  // Add and Assignment
12  a += b;
13  std::cout << "a = " << a << std::endl; // Outputs: a = 4
14
15  // Subtract and Assignment
16  a -= b;
17  std::cout << "a = " << a << std::endl; // Outputs: a = 2
18
19  // Multiply and Assignment
20  a *= b;
21  std::cout << "a = " << a << std::endl; // Outputs: a = 4
22
23  // Divide and Assignment
24  a /= b;
25  std::cout << "a = " << a << std::endl; // Outputs: a = 2
26
27  // Modulo and Assignment
28  a %= b;
29  std::cout << "a = " << a << std::endl; // Outputs: a = 0
30
31  return 0;
32}

In the above example, we use different assignment operators to modify the value of the variable a. The value of a changes in each step as the assignment operator modifies it with the value of b.