Unary Operator
These operators operate or work with a single operand.
| Operator | Symbol | Operation | Implementation |
|---|---|---|---|
| Decrement Operator | — | Decreases the integer value of the variable by one | –x or x — |
| Increment Operator | ++ | Increases the integer value of the variable by one | ++x or x++ |
Example:
C++
// C++ Program to demonstrate the // increment and decrement operators #include <iostream> using namespace std; int main() { int x = 5; // This statement Incremented 1 cout << "x++ is " << x++ << endl; // This statement Incremented 1 // from already Incremented // statement resulting in // Incrementing of 2 cout << "++x is " << ++x << endl; int y = 10; // This statement Decremented 1 cout << "y-- is " << y-- << endl; // This statement Decremented 1 // from already Decremented // statement resulting in // Decrementing of 2 cout << "--y is " << --y << endl; return 0; } |
Output
x++ is 5 ++x is 7 y-- is 10 --y is 8
In ++x, the variable’s value is first increased/incremented before being utilised in the program.
In x++, a variable’s value is assigned before it is increased/incremented.
Similarly happens for the decrement operator.
C++ Arithmetic Operators
Arithmetic Operators in C++ are used to perform arithmetic or mathematical operations on the operands. For example, ‘+’ is used for addition, ‘–‘ is used for subtraction, ‘*’ is used for multiplication, etc. In simple terms, arithmetic operators are used to perform arithmetic operations on variables and data; they follow the same relationship between an operator and an operand.
C++ Arithmetic operators are of 2 types:
- Unary Arithmetic Operator
- Binary Arithmetic Operator