I am new to shell scripting and i have wriiten a script to flag values within a if loop but if i try to call those values in another if loop it is returning null values

Question

#!/bin/sh
cat PLAYARTE_TXT.txt|while read line
do
count1=$(echo $line|wc -c)
a=37
if [[ $count1 -eq  $a ]];
then
b=0 
else
c=1
break
fi
done
if [ "$b" -eq "0" -a "$c" -ne "1" ];
then
echo success
else
echo failure
fi
exit 0

Answer 1

cat is redundant and is the cause to your problem because the "|" pipe creates a subshell. That's why when you go out of the while loop, the value of $b is "lost". just redirect the file to while read loop

#!/bin/bash
while read -r line
do
 count1=$(echo "$line"|wc -c)
 a=37
 if [ "$count1" -eq  "$a" ];then
   b=0
 else
   c=1
   break
 fi
done  < "PLAYARTE_TXT.txt"
if [[ "$b" = 0 && "$c" != 1 ]];then
 echo success
else
 echo failure
fi
exit 0