C

increment and decrement operator

Increment Operators: The increment operator is used to increment the value of 
a variable in an expression. In the Pre-Increment, value is first incremented 
and then used inside the expression. Whereas in the Post-Increment, value is 
first used inside the expression and then incremented.

Decrement Operators: The decrement operator is used to decrement the value of 
a variable in an expression. In the Pre-Decrement, value is first decremented 
and then used inside the expression. Whereas in the Post-Decrement, value is 
first used inside the expression and then decremented.

increment operator

i++ i-- ++i --i

Incrementing / Decrementing Operators

Example    Name              Effect
---------------------------------------------------------------------
++$a       Pre-increment     Increments $a by one, then returns $a.
$a++       Post-increment    Returns $a, then increments $a by one.
--$a       Pre-decrement     Decrements $a by one, then returns $a.
$a--       Post-decrement    Returns $a, then decrements $a by one.

Increment and Decrement Operators

// Working of increment and decrement operators

#include <iostream>
using namespace std;

int main() {
    int a = 10, b = 100, result_a, result_b;

    // incrementing a by 1 and storing the result in result_a
    result_a = ++a;
    cout << "result_a = " << result_a << endl;


    // decrementing b by 1 and storing the result in result_b   
    result_b = --b;
    cout << "result_b = " << result_b << endl;

    return 0;
}