SHELL

for i in range bash

#Just use command seq to iterate a range from start to end
END=10
for i in $(seq 1 $END); do echo $i; done

bash for i in range then

#!/bin/bash

for i in {0..100};
do
	echo "hello"
	sleep 5s
done

bash for i in range

# Brace Expansion
for i in {1..10}; do echo $i; done

bash iterate over a variable range of numbers

#!/bin/bash
START=1
END=5
for i in $(eval echo "{$START..$END}")
do
	echo "$i"
done