Linux

#!/bin/ksh
 
echo " enter:\c"
read a
echo $a

$ echo ${.sh.version}
Version M 1993-12-28 s+
$ type echo
echo is a shell builtin
$ echo " enter:\c"
 enter:$
$ which ksh
/usr/bin/ksh
$

[root@xxx ~]# su - xxxx
$ ksh
$ 
$ 
$ echo ${.sh.version}
Version M 93s+ 2008-01-31
$ 
$ type echo
echo is a shell builtin
$ echo " enter:\c"
 enter:\c
$ which ksh
/bin/ksh
$

echo " enter:\c"

printf " enter:"

echo [  arg  . . .  ] When the first arg  does not begin with a -, 
and none of the arguments contain a \, then echo prints each of
 its arguments separated by a space and terminated by a new-line.
 Otherwise, the behavior of echo is system dependent and print or
 printf described below should be used. See echo(1) for usage and
 description.

echo -n enter:
echo -e 'enter:\c'