Assignment operators are used in a program to assign a value of the right-hand side to the left-hand side as shown below.
1 2 3 4 5 6 | //10 is assign to the variable a int a = 10; //the value of b (10) is assigned to a int b = 20; int a = b; |
These are the short version formed by combining the two operators. For example Instead of writing, int a = a+5, we can write a += 5.
Following are the list of assignment operators used in C++.
| Operator | Description |
|---|---|
| = | Simple assignment operator, Assigns values from right side operands to left side operand.a = b + c; |
| += | Add AND assignment operator, It adds the right operand to the left operand and assigns the result to the left operand.a += b |
| -= | Subtract AND assignment operator, It subtracts the right operand from the left operand and assigns the result to the left operand.a -= b |
| *= | Multiply AND assignment operator, It multiplies the right operand with the left operand and assigns the result to the left operand.a *= b |
| /= | Divide AND assignment operator, It divides left operand with the right operand and assigns the result to the left operand.a /= b |
| %= | Modulus AND assignment operator, It takes modulus using two operands and assigns the result to the left operand.a %= b |
| <<= | Left shift AND assignment operator.a <<= 2 |
| >>= | Right shift AND assignment operator.a >>= 2 or a = a >> 2 |
| &= | Bitwise AND assignment operator.a &= 2 or a = a & 2 |
| ^= | Bitwise exclusive OR and assignment operator.a ^= 2 or a = a ^ 2 |
| |= | Bitwise inclusive OR and assignment operator.a |= 2 or a = a | 2 |
Example: C++ program for Assignment Operators
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 | #include <iostream> using namespace std; int main() { int a = 11; int result; result = a; cout << "= Operator: " << result << endl; result += a; cout << "+= Operator: " << result << endl; result -= a; cout << "- -= Operator: " << result << endl; result *= a; cout << "*= Operator: " << result << endl; result /= a; cout << "/= Operator: " << result << endl; result = 100; result %= a; cout << "%= Operator: " << result << endl; result <<= 2; cout << "<<= Operator: " << result << endl; result >>= 2; cout << ">>= Operator: " << result << endl; result &= 2; cout << "&= Operator: " << result << endl; result ^= 2; cout << "^= Operator: " << result << endl; result |= 2; cout << "|= Operator: " << result << endl; return 0; } |
Output:
1 2 3 4 5 6 7 8 9 10 11 | = Operator: 11 += Operator: 22 - -= Operator: 11 *= Operator: 121 /= Operator: 11 %= Operator: 1 <<= Operator: 4 >>= Operator: 1 &= Operator: 0 ^= Operator: 2 |= Operator: 2 |