-Example:
+##### Example:
ls *.md | head | sed -i `s/markdown/software/g`
where,
* `for`, `in`, `do`, and `done` are keywords
-* `list` contains a list of values separated by spaces. e.g.,
- list= 1 2 3 4 5 6
- list= Bob Mary Sue Greg
+* `list` contains a list of values separated by spaces. e.g. `list` can be replaced by `1 2 3 4 5 6` or by `Bob Mary Sue Greg`. `list` can also be a variable:
+
+ list[0]=Sam
+ list[1]=Lynne
+ list[2]=Dhavide
+ list[3]=Trevor
+ .
+ .
+ .
+ list[n]=Mark
+
+
*