wehub-resource-sync
38 lines
1.9 KiB
HTML
38 lines
1.9 KiB
HTML
<h4>String literal</h4>
|
|
<br>
|
|
<p>string is zero or more characters written inside single or double quotes.</p>
|
|
<p>You can use quotes inside a string, as long as they don't match the quotes surrounding the string:</p>
|
|
<pre><code class="lang-shell">$var1 = "It's alright"
|
|
$var2 = "He is called 'Johnny'"
|
|
$var3 = 'He is called "Johnny"'</code></pre>
|
|
<br>
|
|
<h5>Single quotes</h5>
|
|
<br>
|
|
<p>single quotes allow you to use the syntax of expressions within them.<br/>The <code>@</code> sign must be placed before the expressions.</p>
|
|
<pre><code class="lang-shell">item(title = 'windows dir path: @sys.dir')</code></pre>
|
|
<br>
|
|
<h5>Double quotes</h5>
|
|
<br>
|
|
<p>double quotes allow you to use the Escape Character inside them only.<br/>The backslash (<code>\</code>) escape character turns special characters into characters.<br/>The sequence <code>\" </code> inserts a double quote in a string:</p>
|
|
<pre><code class="lang-shell">$var1 = "hello\"world"
|
|
// result: hello"world</code></pre>
|
|
<p>The complete set of escape sequences is as follows:</p>
|
|
<table class="table">
|
|
<tbody>
|
|
<tr><td>\'</td><td>Single quote</td></tr>
|
|
<tr><td>\"</td><td>Double quote</td></tr>
|
|
<tr><td>\\</td><td>Backslash</td></tr>
|
|
<tr><td>\0</td><td>Null</td></tr>
|
|
<tr><td>\a</td><td>Alert</td></tr>
|
|
<tr><td>\b</td><td>Backspace</td></tr>
|
|
<tr><td>\f</td><td>Form Feed</td></tr>
|
|
<tr><td>\n</td><td>New Line</td></tr>
|
|
<tr><td>\r</td><td>Carriage Return</td></tr>
|
|
<tr><td>\t</td><td>Horizontal Tab</td></tr>
|
|
<tr><td>\v</td><td>Vertical Tab</td></tr>
|
|
<tr><td>\uxxxx</td><td>Unicode escape sequence (UTF-16) \uHHHH (range: 0000 - FFFF)</td></tr>
|
|
<tr><td>\xnnnn</td><td>Unicode escape sequence for character with hex value nnnn (variable length version of \uxxxx)</td></tr>
|
|
<tr><td>\Uxxxxxxxx</td><td>Unicode escape sequence (UTF-32) \U00HHHHHH (range: 000000 - 10FFFF)</td></tr>
|
|
</tbody>
|
|
</table>
|