lst-0028-book.cpp
// https://godbolt.org/z/7foYcMMaz
#include <iostream>
int main() {
/* Sum up from 1 to 100 */
int sum = 0;
for(int number=1; number <= 100; number+=1) { // compact form
sum += number; // for the result
}
std::cout << sum << std::endl;
}