$*21)$

void printFirstelementofArray$($int arr$[])$

$1$

$\}$

printf$("$First element of array $=$ xd$",$ arr $[]$;

This function runs in $O(1)$ time $($or "xococxcxcx"$)$ relative to its input. The input a rray could be $1$ item or $1,000$ items, but this function would still just require one step.

constant time

linear time

quadratic time

all of the time.