Bash loops

The following scripts display the basic usage of the for loop using bash.

The first assigns values directly –> ./ForLoop.sh

  #!/bin/bash
  echo "Bash version ${BASH_VERSION}..."

  for i in 1 2 3 4 5
  do
   echo "i : $i"
  done

Perhaps using a different format –> ./ForLoop.sh

  #!/bin/bash
  echo "Bash version ${BASH_VERSION}..."
  for (( i=1; i<=5; i++ ))
    do
      echo "i : $i"
    done

Assigning values as user entries –> ./ForLoop.sh 1 5

  #!/bin/bash
  echo "Bash version ${BASH_VERSION}..."
  varA=$1
  varB=$2

    for (( i="$varA"; i<="$varB"; i++ ))
      do
        echo "i : $i"
      done

A classic nested loop –> ./ForLoop.sh

  #!/bin/bash
  # loop inside a loop
  echo "Bash version ${BASH_VERSION}..."

  varX=( one two three )
  varY=( 10 20 26 39 48)
  varZ=( "/A" "/B" "/C" )

  for i in "${varX[@]}"
  do
  	for j in "${varY[@]}"
  	do
  		for k in "${varZ[@]}"
  		do
  			echo $i $j $k
  		done
  	done
  done

  #!/bin/bash
  echo "Bash version ${BASH_VERSION}..."

  for day in Mon Tue Wed Thu Fri Sat Sun
  do
   echo -n "day $((i++ + 1)) : $day"   # 1-5 are weekdays
   if [ $i -eq 6 -o $i -eq 7 ]; then   # 6-7 are weekend
     echo " weekend"
     continue;
   fi
   echo " weekday"
  done