Inserting text at the beginning or end of a line

Use the s (substitute) subcommand and these two special substitution characters to insert text at the beginning or end of a line:

To insert text at the beginning of the current working line, enter:
```
s/^/newtext
```
To insert text at the beginning of a specified line, enter:
```
ns/^/newtext
```
where n is the number of the line. This line becomes the current working line.
To insert text at the end of the current working line, enter:
```
s/$/newtext
```
To insert text at the end of a specified line, enter:
```
ns/$/newtext
```
where n is the number of the line. This line becomes the current working line.