for condition one liners

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To use basic for loop

for VARIABLE in 1 2 3 4 5 .. N

do

      command1

      command2

      commandN

done

OR

for VARIABLE in file1 file2 file3

do

      command1 on $VARIABLE

      command2

      commandN

done

OR

for OUTPUT in $(Linux-Or-Unix-Command-Here)

do

      command1 on $OUTPUT

      command2 on $OUTPUT

      commandN

done

To work with numeric values in for loop

for i in 1 2 3 4 5

do

   echo "Current number is $i "

done

OR

for i in {1..5}

do

   echo "Welcome $i times"

done

OR

echo "Bash version ${BASH_VERSION}..."

for i in {0..10..2}

  do

     echo "Welcome $i times"

 done

Note:-syntax used in for loop is {START..END..INCREMENT}

To write traditional three condition for loop

for (( EXP1; EXP2; EXP3 ))

do

      command1

      command2

      command3

done

To create an infinite loop using for that exits on CTRL+C key

# for (( ; ; ))

do

   echo "infinite loops [ hit CTRL+C to stop]"

done

Conditional for loop with break

for I in 1 2 3 4 5

do

  statements1      #Executed for all values of ''I'', up to a disaster-condition if any.

  statements2

  if (disaster-condition)

  then

      break                #Abandon the loop.

  fi

  statements3          #While good and, no disaster-condition.

done

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