Shell Programming and Scripting

some,thing,florida
any1,thing1,california
some2,thing2,dallas
just,fun,kansas

what,ever,florida-state,,,,,,
some,one,dallas_state,,,,,,

some,thing,florida-state
some2,thing2,dallas-state

awk -F, 'FNR==NR{a[$3]=$0;next} {
split($3,b,"-")
for(i in a) {
if(i==b[1]) {
 print a[i]"-"b[2]
 break
}}}' a.txt b.txt

 
awk -F, 'FNR==NR{a[$3]=$0;next} {
split($3,b,"-")
for(i in a) {
if(i==b[1]) {
print a[i]"-"b[2]
break
}}}' a.txt b.txt
 
Here what value variable i of for loop have is this interger or strings like florida...?
If this is index then how variable know that it should ne string. As default variable always have value =0

awk 'BEGIN{a[1]="TEJESH";print a[1];print a["1"]}'

awk -F',' '{print $1","$2","$3"-state";}' /home/logs/A.txt> /home/logs/A_temp.txt

some,thing,florida-state
any1,thing1,california-state
some2,thing2,dallas-state
just,fun,kansas-state

what,ever,florida-state,,,,,,
some,one,dallas_state,,,,,,

some,ever,thing,florida-state 
some2,one,thing2,dallas-state

awk -F',' '{print $1","$2","$3"-state";}' /home/logs/A.txt> /home/logs/A_temp.txt
awk -F',' 'NR==FNR{f1[$3]=$0;next} ($3 in f1) {print f1[$3]"," $0}' /home/logs/A_temp.txt /home/logs/B.txt> /home/logs/B_temp.log

awk -F',' '{ print $5","$1","$2","$3}' /home/logs/B_temp.log > /home/logs/C.txt