In the following code, the variable indentAmt $\_\_\_\_\_$ at each recursive call.

int sum$($int n$,$ string indentAmt$)\{$

int result $=0$;

if $($n $==0)\{$

cout $<<$ indentAmt $<<$ "your value is: $"<<$ n $<<$ endl;

return $0$;

$\}$

else $\{$

cout $<<$ indentAmt $<<$ "your value is: $"<<$ n $<<$ endl;

result $=$ n $+$ sum$($n $-1,$ indentAmt $+"")$;

$\}$

cout $<<$ indentAmt $<<$ "Returning pos $="<<$ n $<<$ endl;

return result;

$\}$