C++ - increment operator
The increment (++) is an unary operator in C++ and hence acts upon a single operand to produce a new value. It has two variant:
- Pre-increment: Increases the value of the operand by 1, then returns the operand.
- Post-increment: Returns the operand, then increases the value of the operand by 1.
Example: Pre-increment operator
The example below describes the usage of pre-increment operator.
#include <iostream> using namespace std; int main (){ int x = 10; int y = 20; int z; //below expression is equivalent to //x = x + 1; z = x + y; z = ++x + y; //Displaying the result cout<<"x = "<<x<<"\n"; cout<<"y = "<<y<<"\n"; cout<<"z = "<<z<<"\n"; return 0; }
The output of the above code will be:
x = 11 y = 20 z = 31
Example: Post-increment operator
The example below describes the usage of post-increment operator.
#include <iostream> using namespace std; int main (){ int x = 10; int y = 20; int z; //below expression is equivalent to //z = x + y; x = x + 1; z = x++ + y; //Displaying the result cout<<"x = "<<x<<"\n"; cout<<"y = "<<y<<"\n"; cout<<"z = "<<z<<"\n"; return 0; }
The output of the above code will be:
x = 11 y = 20 z = 30
❮ C++ - Operators