Assume that a square matrix mat is defined by ${\displaystyle \underset{\phantom{}}{\overset{\phantom{}}{}}}[][]$ mat $=$ new int $[$SIZE$][$SIZE$]$;

$//$SIZE is an integer constant $2$

What does the following code segment do$?$

for $($int $i=0$; $i++i,$jiabcd$2,6$

$4,326$

$43$

$43$

$262,6$

$4,3j=0$;$ji$; $i++$