I want to make triangle using even number

Question

hello, how can i make triangle using even number like this?
2
4 12
6 14 20
8 16 22 26
10 18 24 28 30

Answer 1

there is also setw and setfill from iomanip
http://www.cplusplus.com/reference/iomanip/setw/

Answer 2

If you assume your numbers are 3 digits max, you can use printf("%4d", x); to always use 4 spaces to print the number. If you wish to do a better centering job, use the following:
if (x < 10)
cout<<" "<<x<<" "; // 2 spaces, x, 1 space
else if (x < 100)
cout<<" "<<x; // 2 spaces, x
else
cout<<" "<<x; // 1 space, x

Answer 3

rudolph, can you make the limit for the number? i want the even number less than 25 (2, 4, 6...., 24)

Answer 4

thanks rudolph, you are my hero

Answer 5

rudolph, can you give me the simple program again? the link is broken