Окончание программы в C#(назовите синтаксис)

Program TaskA;
Var i, n: Integer;
Begin
Randomize;
n := Random(10);
For i := 1 To n Do
WriteLn(Random, ' ');
End.

Program TaskB;
Var i: Integer;
Begin
Randomize;
For i := 1 To 10 Do
WriteLn(Random, ' ');
End.

Program TaskC;
Var i: Integer;
Begin
Randomize;
For i := 1 To 10 Do
WriteLn(Random(11), ' ');
End.

Program TaskD;
Var i: Integer;
Begin
Randomize;
For i := 1 To 10 Do
WriteLn(Random(10), ' ');
End.

Program TaskE;
Var i: Integer;
Begin
Randomize;
For i := 1 To 10 Do
WriteLn(Random(20 + 10 + 1) - 10, ' ');
End.

Program TaskF;
Var i: Integer;
Begin
Randomize;
For i := 1 To 10 Do
WriteLn(Random(122 + 97 + 1) - 97, ' ');
End.

Program TaskG;
Var i, sum: Integer;
BeginRandomize;
For i := 1 To 10 Do
sum := sum + Random(11);
WriteLn(sum);
End.

Объяснение:

#include "pch.h"

#include <stdio.h>

#include <iostream>

#include <cmath>

using namespace std;

int main()

{

setlocale(LC_ALL, "Russian");

int num, k=0;

string str;

cout << "Введи многозначное число" << endl;

cin >> num;

while (num != 0)

{

 k += 1;

 num /= 10;

}

if(k==1)

{

 cout << k << " цифра" << endl;

}

else if (k >= 2 && k <= 4) {

 cout << k << " цифры" << endl;

}

else {

 cout << k << " цифр" << endl;

}

system("pause");

return 0;

}