For example sum of 1 to 10 inclusive is ...

src/for_example.cpp

@@ -0,0 +1,12 @@
+#include <iostream>
+
+int main()
+{
+  int sum = 0;
+
+  for (int value = 1; value <= 10; ++value)
+    sum += value;
+  std::cout << "Sum of 1 to 10 inclusive is "
+	    << sum << std::endl;
+  return 0;
+}