find and replace

Shell Programming and Scripting
1

Hi,
Iam new to shell script.How to write bourn shell script for find and replace.

My requirement is:

variable:
name="abcd & co"

i wanted to replace '&' with amp; plz suggest with out using sed.

Thanks lot.

2 
[tmp]$ cat r.sh
#! /bin/sh

name="abcd & co"
echo ${name/&/amp}
[tmp]$ ./r.sh 
abcd amp co
[tmp]$
3

u can use sed as well

name="abcd & co"
name=`echo $name | sed 's/&/amp/'`
echo $name