How to change $EUID value to non-zero in the bash shell

I have a script(test1.sh) like the below and i need to run it as root because As a prerequisites, we need to install a couple of packages when it enters into this script, value $EUID should be non-zero, Coul you help me to change this $EUID value


test1.sh
<code>
#!/usr/bin/env bash




....
.....


if [[ $EUID -eq 0 ]]; then
echo "This script must be run as nonroot user. Otherwise, couple of test cases will fail."
exit 1
fi


.........
..........
.............
.....


..
.
.
.
.............
</code>


Thank you

So why can't you do
sudo test1.sh

Or within the script itself, for the actual command(s) that need root.
sudo install