[bash] loop example

loop.sh

#!/bin/bash

#Basic

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

#Basic and leading zero

for num in {1..5}
do
	value=$(printf "%02d" $num)
	echo $value
done

# Countdown - BOOM !!

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


## save $START, just in case if we need it later ##

i=$START
while [[ $i -le $END ]]
do
	echo "$i"
	((i = i + 1))
done

## define an array ##
arrayname=( Dell HP Oracle )
 
## get item count using ${arrayname[@]} ##
for m in "${arrayname[@]}"
do
	echo "${m}"
	# do something on $m #
done