lst-0029-book.cpp
// https://godbolt.org/z/185ha3q3f
#include <iostream>
int main() {
/* Sum up from 1 to 100 */
int sum = 0;
int number = 1; // Initialization before the loop
for( ; number <= 100; number=number+1) { // empty initialization
sum = sum + number;
}
std::cout << number << std::endl; // number now also exists outside
}