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#include <iostream>

using namespace std;

int main()
{
    cout<<"Hello World"<<endl;

    //for ( initialization ;  condition checking  ; change (increment/ decrement) )

    // for( int i = 100 ; i > 0 ; i = i/2 ){

    //     cout << i << endl ;
    // }

    // int i = 5;
    // for( ;  ; i++ ){

    //     cout << i << endl ;
    // }

    int i = 0 ;

    // false = 0 (int)
    // true = any non zero value (int)

    // while (true) {

    // }

    do{

        cout<<i<<endl;

    } while(i>1);

    int num = 13 ;

    if (num%4 == 0){     //  (0 == 0)
        cout<< "num "<< num <<" is divisible by 4"<<endl;
    }

    cout<<"shesh"<<endl;

    int marks = 80 ;

    if(marks > 70){
        cout <<"a+" << endl;
    }
    else if( marks >=50 ){
        cout <<"b+" << endl;
    }
    else{
        cout << "f" << endl;
    }

    char gender = 'F';

    if (gender == 'M' ){
        cout<<"male"<<endl;
    }
    else if (gender == 'F') {
        cout<< "female"<<endl;
    }
    else {
        cout<< "invalid"<<endl;
    }


    int counter = 0 , n = 4;
    for(int i = 0 ; i < n ; i++){
        cout<<"outer loop i = "<< i << endl;
        for(int j = 0 ; j < n ; j++){
            counter++;
            cout << "inner loop j = " << j << " counter "<<counter<< endl;
        }
    }

    cout<< counter <<endl;

    return 0;
}