how to create a for loop in c 2b 2b

1//'i' can be any number
2//Can be any comparison operater 
3//can be any number compared
4//can be any mathmatic operater
5
6for (int i = 0; i<100; i++){
7//Do thing
8}
9
10//more info on operaters
11//https://www.w3schools.com/cpp/cpp_operators.asp

1#include <iostream>
2using namespace std;
3
4int main()
5{
6	for (int i = 0; i < 20; i++)
7    {
8		cout << i << endl;
9    }
10  	//prints the number (i)
11}

1for ( int i = 0; i < 5; i++)
2{
3  cout << "Hello" << endl;
4}
5// prints hello 5 times.