how to make a loop on .sh code example

Example 1: for loop in shell script

for i in {1..5}
do
   echo "Welcome $i times"
done

Example 2: for loop iteration in shell script

#!/bin/bash
START=1
END=5
echo "Countdown"
 
for (( c=$START; c<=$END; c++ ))
do
	echo -n "$c "
	sleep 1
done
 
echo
echo "Boom!"