#include<iostream>
using namespace std;

int main() {
    int n;
    cout << "Enter Number: ";
    cin >> n;
    for(int k = 1; k <= n * 2 - 1; k++) {
        for(int l = 1; l <= n * 2 - 1; l++) {
            if(k == n || l == n || k == 1 && l >= n || k <= n && l == 1 || k >= n && l == n * 2 - 1 || k == n * 2 - 1 && l <= n)
                cout << " *";
            else
                cout << "  ";
        }
        cout << endl;
    }
    return 0;
}

#include<iostream>
using namespace std;        
int main() {
    int n;
    cout<<"Enter range:";
    cin>>n;
    for(int i=n; i>=1; i--) {
        for(int j=1; j<=i; j++) {
            cout<<j<<" ";
        }
        cout <<endl;
    }
    return 0;
}

#include<iostream>
using namespace std;
int main() {
    int n;
    cout<<"Enter range:";
    cin>>n;
    for(int i=n; i>=1; i--) {
        for(int j=i; j<=n; j++) {
            cout<<j<<" ";
        }
        cout <<endl;
    }
    return 0;
}

#include <iostream>
#include <functional>
#include <vector>

using namespace std;

class EventEmitter {
private:
    struct FuncObj {
        string mesType;
        std::function<void(int)> callback;
    };

    vector<FuncObj> funcs;

public:
    EventEmitter() {}

    void on(string mesType, std::function<void(int)> callback) {
        funcs.push_back(FuncObj{ mesType, callback });
    }

    void emit(string mesType, int obj) {
        for (auto& funobj : funcs) {
            if (funobj.mesType == mesType) {
                funobj.callback(obj);
            }
        }
    }
};

void callback(int a) {
    cout << "hi" << a;
}

int main() {
    EventEmitter e;
    e.on("message", callback);
    e.emit("message", 7);
    return 0;
}

#include <iostream>

bool isLeapYear(int year) {
    if ((year % 4 == 0 && year % 100 != 0) || (year % 400 == 0)) {
        return true;
    } else {
        return false;
    }
}

int main() {
    int year;
    std::cout << "Enter a year: ";
    std::cin >> year;

    if (isLeapYear(year)) {
        std::cout << year << " is a leap year." << std::endl;
    } else {
        std::cout << year << " is not a leap year." << std::endl;
    }

    return 0;
}

#include<iostream>
using namespace std;
class Adder{
    public:
    int num[100];
    int n=0;
    void entNum(void);
    void numShow(void);
    void printCal(void);

};
void Adder::entNum(void){
    int i=0;
    char c;
    for(;i<50;i++){
    cout<<"Enter "<<i+1<<"s number : ";
    cin>>num[i];
    n++;
    if(i<1)
    continue;
    cout<<"Are you want add more type y or n ";
    cin>>c;
    if(c=='n')
    break;
} }

void Adder::numShow(void){
    cout<<"\n\nYou entered ";
    for(int i=0;i<n;i++){
    cout<<num[i]<<" ";
    }}
    
void Adder::printCal(void){
    int i=0;
    int res=0;
    for(;i<n;i++){
    res=res+num[i];
    }
    cout<<"\nTotal = "<<res;
}
int main (){
    Adder add;  
    cout<<"Number Adder\n"<<endl;
    add.entNum();
    add.numShow();
    add.printCal();
    return 0;
    }

00:00:00 - Intro of video
00:02:26 - Introduction to node js
00:05:59 - Setup node js environment 
00:07:33 - Installing Visual studio Code IDE
00:08:39 - Installing Node js
00:12:58 - Understand about node folder setup
00:15:18 - Basic function of js console.log
00:19:25 - Basic Datatypes of js (Start of basic javascript)
00:25:15 - Variables and Constant in js
00:33:45 - Js Object and List (Array)
00:53:08 - Javascript Operators
01:02:24 - if else Control statement in js
01:08:00 - while and for loops in js
01:17:01 - functions in javascript
01:21:23 - Understand asynchronous javascript
01:26:52 - Understand why async/await in js
01:31:01 - Understand js callback functions
01:36:38 - Use of built in modules in js (example: fs module)
01:40:32 - installing external libraries and fetching data (example axios)
01:48:14 - Anonymous functions in js
01:51:38 - Some of my words for why you learnt this js