Bash while loop

while [CONDITION]
do
  [COMMANDS]
done

i=0

while [ $i -le 2 ]
do
  echo Number: $i
  ((i++))
done

while :
do
  echo "Press <CTRL+C> to exit."
  sleep 1
done

while :; do echo 'Press <CTRL+C> to exit.'; sleep 1; done

file=/etc/passwd

while read -r line; do
  echo $line
done < "$file"

i=0

while [ $i -lt 5 ]
do
  echo "Number: $i"
  ((i++))
  if [[ "$i" == '2' ]]; then
    break
  fi
done

echo 'All Done!'

Number: 0
Number: 1
All Done!

i=0

while [ $i -lt 5 ]
do
  ((i++))
  if [[ "$i" == '2' ]]; then
    continue
  fi
  echo "Number: $i"
done

echo 'All Done!'

Number: 1
Number: 3
Number: 4
Number: 5
All Done!