lec4vid3loops

#!/bin/bash

# Demostrate the use of shift and while loops

# Display the first three parameters 
echo "parameter 1: ${1}"
echo "parameter 2: ${2}"
echo "parameter 3: ${3}"
echo "parameter 4: ${@}"

# The while loop
X=1
while [ $X -eq 1 ]
do
 echo "$(type -a while)"
 echo "THE VALUE OF X IS: $X"
# sleep 1    # Delay for a specified amount of time
 X=8
done

# The while loop using true 
while [ true ]  # Return a successful result. Exit Status: Always succeeds.
do
 echo "$RANDOM"
 sleep 0.5    
done
 
# Loop through all positional parameters  
while [ $# -gt 0 ]
do 
  echo "No of parameters: $#"
  echo "parameter 1: ${1}"
  echo "parameter 2: ${2}"
  echo "parameter 3: ${3}"
echo 
shift 1
done