Shell Programming and Scripting

#!/bin/bash
while read L1
do
    if [ "${L1:0:1}" = "#" ]
    then
        read L2
        /statistic_program $L1 $L2
done < input.txt

#!/bin/bash
while read L1 # reads the current line and stores it in L1
do
    if [ "${L1:0:1}" = "#" ] # gives the first character of curent line
    then
    read L2 # reads the next line ans stores it in L2
    /statistic_program $L1 $L2 # runs the program with the values of L1 and L2 as parameters
done < input.txt

#!/bin/bash
while read L1
do
    if [ "${L1:0:1}" = "#" ]
    then
        read L2
        /statistic_program $L1 $L2
    fi
done < input.txt

#read_1
123456898787987

#!/bin/bash
I=0
while read L1
do
    if [ "${L1:0:1}" = "#" ]
    then
        read L2
        DATA[$I]=$L2
        (( I++ ))
    fi
done < input.txt
/statistic_program ${DATA[@]}