Please make sure that your analysis is simplified and please explain how you derived your analysis. Give an analysis of the running time in terms of Big O and a brief explanation as to how you determined the Big O$.$

Implement the code in the language C$++$ In other words make the code run by printing values to the screen.

sum $=0$;

for$($i $=0$; i $<$ n; $++$i$)$

for$($j $=0$; j $<$ i; $++$j$)$

$++$sum;