Shell Programming and Scripting

bash-3.00$  c=0
bash-3.00$  test_loop() {
>      c=$(($c+1))
>      echo "count value is : $c "
>      sleep 1
>      test_loop
> }
bash-3.00$ test_loop
count value is : 1 
count value is : 2 
count value is : 3 
count value is : 4 
count value is : 5 
^C
count value is : 6 
^C
count value is : 7 
^C
count value is : 8 
^Z
[1]+  Stopped                 sleep 1
count value is : 9 
count value is : 10 
count value is : 11 
^Z
[2]+  Stopped                 sleep 1
count value is : 12 
count value is : 13 
count value is : 14 
count value is : 15 
count value is : 16 
count value is : 17

 c=0 
 test_loop() {
     while true
     do
     echo "$c"
     let c++
     sleep 1
     done
 }

bash-3.00$ stty -a
speed 38400 baud; 
rows = 37; columns = 190; ypixels = 0; xpixels = 0;
csdata ?
eucw 1:0:0:0, scrw 1:0:0:0
intr = ^c; quit = ^\; erase = ^h; kill = ^u;
eof = ^d; eol = <undef>; eol2 = <undef>; swtch = <undef>;
start = ^q; stop = ^s; susp = ^z; dsusp = ^y;
rprnt = ^r; flush = ^o; werase = ^w; lnext = ^v;
-parenb -parodd cs8 -cstopb -hupcl cread -clocal -loblk -crtscts -crtsxoff -parext 
-ignbrk brkint -ignpar -parmrk -inpck -istrip -inlcr -igncr icrnl -iuclc 
ixon -ixany -ixoff imaxbel 
isig icanon -xcase echo echoe echok -echonl -noflsh 
-tostop echoctl -echoprt echoke -defecho -flusho -pendin iexten 
opost -olcuc onlcr -ocrnl -onocr -onlret -ofill -ofdel tab3