UNIX for Dummies Questions & Answers

I have a file

Code:

1
298167
298168
1093209
1093210
1422663

I want to write a code where in I want to read contents of above file
like first read is 1
second read is 298167

Substract second read from first and if this is greater than or less than 99,999.

Similarly I want to traverse thru the whole file

Contents are always sorted. Values are random
it can be

Code:

1
100
99999
198591

What did you attempt so far?

I think I made almost everything.. but I need a small help

I want to exit a loop without using exit. I mean I dont want the program to end. Just end of loop is some condition is reached.

Please note below code has a lot more logic than mention in my query above.

#!/bin/sh
file="drop/test1"
blk_val=99999
while read j
do
prev=$j
prev1=$j
blk_flag=0
loop_count=0
blk_size=0
while read j
do
if [ ${j} -gt ${prev} ]; then
next=$j
blk_size=`expr $next - $prev + $blk_size + 1 `
if [ ${blk_size} -ge ${blk_val} ]; then
if [ ${blk_flag} -eq 1 ]; then
if [ ${loop_count} -eq 0 ]; then
header=$prev1
trailer=$next
prev=`expr $next + 1`
echo h0=$header
echo t0=$trailer
blk_size=0
blk_flag=0
loop_count=1
prev1=`expr $trailer + 1`
else
prev1=`expr $trailer + 1`
trailer=$next
prev=`expr $next + 1`
header=$prev1
echo h1=$header
echo t1=$trailer
blk_size=0
blk_flag=0
fi
else
header=$prev
trailer=$next
prev=`expr $next + 1`
blk_size=0
echo h2=$header
echo t2=$trailer
fi
else
prev=`expr $next + 1`
blk_flag=1
fi
fi
done < $file
echo h3=$header
echo t3=$trailer
done < $file

Please use code tags as required by forum rules!

What about using the break command?