# ```scheme
 (require racket/string)
```

* Item 1.

* Item 2.

## 1. Section

Italic. \_Just underlines\_.

Bold. \*Just asterisks.\*

“Dobule quoted”. ‘Single quoted’.

`Hi, world.`  
`A “quote”.`  
`Second line.`
`Last line.`  

The end.

`THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS`   
`“AS IS” AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT`     
`LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR` 
`A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT`  
`HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,`
`SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT`      
`LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,` 
`DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY` 
`THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT`   
`(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE` 
`OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.`  

```scheme
(make-string k [char]) -> string?
  k : exact-nonnegative-integer? 
  char : char? = #\nul           
```

Returns a new mutable string of length `k` where each position in the
string is initialized with the character `char`