Shell Programming and Scripting

$ more file.txt
AAA 001
BBB 002
CCC 003
DDD 004

$ more looptest.ksh
#! /bin/ksh

while read line
do
   awk '{print FS,$1}' >> var1
   awk '{print FS,$2}' >> var2
   
   if [[ $var1 = AAA ]]
   then
           echo group1 $var2
   elif [[ $var1 =  CCC ]]
   then
           echo group2 $var2
    fi 
done < file.txt

awk '{print FS,$1}' >> var1
awk '{print FS,$2}' >> var2

var1=`echo $line | awk '{print FS,$1}'`
var2=`echo $line |awk '{print FS,$2}'`

#! /bin/ksh
while read line
do
var1=`echo $line | cut -f1 -d" "` 
var2=`echo $line | cut -f2 -d" "`
   if [[ $var1 = AAA ]]
   then
           echo group1 $var2
   elif [[ $var1 =  CCC ]]
   then
           echo group2 $var2
    fi 
done < file.txt

#! /bin/ksh
while read var1 var2
do
   if [[ $var1 = AAA ]]
   then
           echo group1 $var2
   elif [[ $var1 =  CCC ]]
   then
           echo group2 $var2
    fi 
done < file.txt