### Traingular integer Sequence

How do i print the following using nested loops
654321
54321
4321
321
21
1
Flow Control Tutorial (including iteration statements like loops)
http://www.cplusplus.com/doc/tutorial/control/

What have you tried so far?
Last edited on
Hello imyourjoy,

You may also find https://www.learncpp.com/cpp-tutorial/57-for-statements/ useful.

Finished mine with the output of:
 ``` 6 5 4 3 2 1 5 4 3 2 1 4 3 2 1 3 2 1 2 1 1 Press Enter to continue: ```

Andy
my current progress is
654321
65432
654
65
6

I'll look into the websites that you guys have shared. Thanks alot!!
to loop in reverse, something like

for(int i = 6; i >0; i--)
cout << i << endl;

this is also one of the very small handful of places where a c style string can get a leg up.
char c[] = "654321";
char *cp = c;
..
cout << cp++; //in the loop. This makes it doable in 1 loop instead of nested with minimal effort.

once you know that, you can (ab)use c++ for it:
string c = "654321\0";
char *cp = &c[0];
as above.

gives you this shorty:
 ``12345678`` ``````int main () { string c = "654321\0"; char * cp = &c[0]; for(int i = 0; i < c.length(); i++) cout << cp++ << endl; return 0; }``````
Last edited on
You don't need nested loops. Just one.

 ``123456`` ``````#include int main() { for (const char* cp = "654321"; *cp; std::cout << cp++ << '\n'); }``````

 ``` 654321 54321 4321 321 21 1 ```