I have one request, First it has to create one file and in that file
it has to include some lines based on user request.

Suppose user requested 10, then script needs to add 10 lines like below

QAEVO_A1|A1
QAEVO_A2|A2
QAEVO_A3|A3
QAEVO_A4|A4
QAEVO_A5|A5
QAEVO_A6|A6
QAEVO_A7|A7
QAEVO_A8|A8
QAEVO_A9|A9
QAEVO_10|A10


Thanks,
Sri.

do u mean want to append the lines in a file based on the user inputs ?

Try this code.

echo "Enter a request"
read n
#echo $n
for i in  `seq 1 $n`
do
        echo QAEVO_A1\|A$i | cat >> output
done

sh request.sh
Enter a request
5

cat output

QAEVO_A1|A1
QAEVO_A1|A2
QAEVO_A1|A3
QAEVO_A1|A4
QAEVO_A1|A5

Try this script,

#!/bin/sh
>output_file
echo "Enter the value in digit";
read value
for ((i=1; i<=$value; i++))
do
        echo "QAEVO_A${i}|A${i}"  >>output_file
done

Sample code,

echo -n " Enter the file name to create : "
read file
echo -n " Enter the number of lines to add :"
read lines
i=1;
while [ $i -le $lines ]
do
        echo   "QAEVO_A$i|A$i" >>$file
        let i=$i+1;
done
echo  " File $file created"

I think there's more than one way to skin a cat.

I don't have an idea of your inputs , but If you want to append a line in a file with a loop using script then you might refer this script

read num  # Get an input 

for i in `seq 1 $num`
do
   
        cat >>filename <<EOF;
line you want to add in a file ${array[$i]}   # array can be variable of value , you can modify this line as u desire 
EOF
done