Lambda expressions

#include <iostream>
using namespace std;

int main()
{
    // [ captures ] ( params ) { body }
    //
    [](){cout << "Shortest decleration " << endl;}();
    // [](int a, int b){ cout << "Parameters sum: " << a+b << endl;} (10,20);
    int sum =[](int a, int b){return a+b;} (10,20);
    cout << "Parameters sum: " << sum << endl;

    int a = 5;
    auto function = [a]() {cout << a << endl; }; // Passing A by value, a value won't change the expression
    function();
    a = 10;
    function();

    auto function2 = [&a]() {cout << a << endl;}; // Passing A by reference, change will occur
    function2();
    a = 20;
    function2();

}