<h2 id="heading-printing">Printing</h2>
<ul>
<li><code>echo "my simple output"</code></li>
<li><code>echo -e "interpret \b backslash \n escapes</code></li>
<li><code>echo -n "output without trailing new line"</code></li>
<li><pre><code class="lang-bash">printf "String: %s\nDecimal: %d\nHex: %x\nOctal: %o\n" Hello 100 100 100 
String: Hello
Decimal: 100
Hex: 64
Octal: 144
</code></pre>
</li>
</ul>
<h2 id="heading-variables">Variables</h2>
<ul>
<li>storing: <code>location="hello"</code></li>
<li>accessing: <code>"${location}"</code></li>
</ul>
<h2 id="heading-comparison">Comparison</h2>
<ul>
<li><pre><code class="lang-bash">if [ "$x" = "valid" ]; then
 echo "x has the value 'valid'"
else
echo "x does not have the value 'valid'"
fi
</code></pre>
</li>
<li><pre><code class="lang-bash">[ "$x" = "valid" ] &amp;&amp; echo "x has the value 'valid'"

[ "$x" = "valid" ] || { echo invalid &amp;&amp; false } &amp;&amp; echo "valid"
</code></pre>
</li>
</ul>
<ul>
<li><pre><code class="lang-bash">grep -i $name ~uli101/uli101/phonebook

if [ "$?" != "0" ]
 then echo -n "Name '$name' not in directory "
fi
</code></pre>
</li>
</ul>

## Printing

- `echo "my simple output"`
- `echo -e "interpret \b backslash \n escapes`
- `echo -n "output without trailing new line"`
- ```bash
  printf "String: %s\nDecimal: %d\nHex: %x\nOctal: %o\n" Hello 100 100 100    
  String: Hello
  Decimal: 100
  Hex: 64
  Octal: 144
  ```

## Variables

- storing: `location="hello"`
- accessing: `"${location}"`


## Comparison

- ```bash
if [ "$x" = "valid" ]; then
    echo "x has the value 'valid'"
else
  echo "x does not have the value 'valid'"
fi
  ```

- ```bash
  [ "$x" = "valid" ] && echo "x has the value 'valid'"

  [ "$x" = "valid" ] || { echo invalid && false }  && echo "valid"
  ```


- ```bash
  grep -i $name ~uli101/uli101/phonebook

  if [ "$?" != "0" ]
    then echo -n "Name '$name' not in directory "
  fi
  ```





Bash Scripting Cheat sheet

Printing

Variables

Comparison