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Updated the table in boolean.md (#399)
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* Updated the table in boolean.md
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@YiyunNi
YiyunNi authored Aug 18, 2021
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103 changes: 21 additions & 82 deletions site/en/reference/boolean.md
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Expand Up @@ -81,26 +81,14 @@ The following table lists the description of each symbol in the above Boolean ex

### Logical operators:

<table>
<tr>
<td><b>Symbol</b></td>
<td><b>Operation</b></td>
<td><b>Example</b></td>
<td><b>Description</b></td>
</tr>
<tr>
<td>'and' &amp;&amp;</td>
<td>and</td>
<td>expr1 &amp;&amp; expr2</td>
<td>True if both expr1 and expr2 are true.</td>
</tr>
<tr>
<td>'or' ||</td>
<td>or</td>
<td>expr1 || expr2</td>
<td>True if either expr1 or expr2 are true. </td>
</tr>
</table>

| **Symbol**| **Operation** | **Example** | **Description** |
| ----------| ------------- | ----------- | ------------------------- |
| 'and' && | and | expr1 && expr2 | True if both expr1 and expr2 are true. |
| 'or' \|\| | or | expr1 \|\| expr2 | True if either expr1 or expr2 are true. |




### Binary arithmetic operators:

Expand Down Expand Up @@ -130,68 +118,19 @@ The following table lists the description of each symbol in the above Boolean ex

The following table lists the precedence and associativity of operators. Operators are listed top to bottom, in descending precedence.

<table>
<tr>
<td><b>Precedence</b></td>
<td><b>Operator</b></td>
<td><b>Description</b></td>
<td><b>Associativity</b></td>
</tr>
<tr>
<td>1</td>
<td>+ - </td>
<td>UnaryArithOp</td>
<td>Left-to-right</td>
</tr>
<tr>
<td>2</td>
<td>not</td>
<td>UnaryLogicOp</td>
<td>Right-to-left</td>
</tr>
<tr>
<td>3</td>
<td>**</td>
<td>BinaryArithOp</td>
<td>Left-to-right</td>
</tr>
<tr>
<td>4</td>
<td>* / %</td>
<td>BinaryArithOp</td>
<td>Left-to-right</td>
</tr>
<tr>
<td>5</td>
<td>+ -</td>
<td>BinaryArithOp</td>
<td>Left-to-right</td>
</tr>
<tr>
<td>6</td>
<td>&lt; &lt;= &gt; &gt;= </td>
<td>CmpOp</td>
<td>Left-to-right</td>
</tr>
<tr>
<td>7</td>
<td>== != </td>
<td>CmpOp</td>
<td>Left-to-right</td>
</tr>
<tr>
<td>8</td>
<td>&amp;&amp; and </td>
<td>BinaryLogicOp</td>
<td>Left-to-right</td>
</tr>
<tr>
<td>9</td>
<td>|| or </td>
<td>BinaryLogicOp</td>
<td>Left-to-right</td>
</tr>
</table>

| Precedence | Operator | Description | Associativity |
|------------|-----------|---------------|---------------|
| 1 | + - | UnaryArithOp | Left-to-right |
| 2 | not | UnaryLogicOp | Right-to-left |
| 3 | ** | BinaryArithOp | Left-to-right |
| 4 | * / % | BinaryArithOp | Left-to-right |
| 5 | + - | BinaryArithOp | Left-to-right |
| 6 | < <= > >= | CmpOp | Left-to-right |
| 7 | == != | CmpOp | Left-to-right |
| 8 | && and | BinaryLogicOp | Left-to-right |
| 9 | \|\| or | BinaryLogicOp | Left-to-right |


Expressions are normally evaluated from left to right. Complex expressions are evaluated one at a time. The order in which the expressions are evaluated is determined by the precedence of the operators used.

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