Difference between revisions of "Relational and Logical Operators"

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[[Category:Operators]]
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{{HelpFiles}}  
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{{HelpFiles}}
 
  
−
===Relational and Logical Operators===
+
=== Relational and Logical Operators ===
  
−
Relational refers to the relationships that values can have with one another, and logical refers to the ways in which true and false values can be connected together. Since the relational operators produce true or false results, they are often used in combination with the logical operators.
+
Relational refers to the relationships that values can have with one another, and logical refers to the ways in which true and false values can be connected together. Since the relational operators produce true or false results, they are often used in combination with the logical operators.  
  
−
The relational operators are as follows:
+
The relational operators are as follows:  
  
−
{| class="tableintopic" style="border-collapse: collapse; border: 1px solid #010101" width="1189" border="1" cellpadding="2"
+
{| width="1189" cellspacing="0" cellpadding="2" border="1" class="tableintopic" style="border-collapse:collapse; border:1px solid #010101"
 
|- align="left" valign="top"
 
|- align="left" valign="top"
−
| style="border: 1px solid #010101" width="594" bgcolor="#C0C0C0" |
+
| width="594" bgcolor="#C0C0C0" style="border:1px solid #010101;" |  
 
'''Operator'''
 
'''Operator'''
−
| style="border: 1px solid #010101" width="594" bgcolor="#C0C0C0" |
+
 
 +
| width="594" bgcolor="#C0C0C0" style="border:1px solid #010101;" |  
 
'''Meaning'''
 
'''Meaning'''
 +
 
|- align="left" valign="top"
 
|- align="left" valign="top"
−
| style="border: 1px solid #010101" width="594" |
+
| width="594" style="border:1px solid #010101;" |  
−
<nowiki>==</nowiki>
+
==
−
| style="border: 1px solid #010101" width="594" |
+
 
 +
| width="594" style="border:1px solid #010101;" |  
 
Equal to
 
Equal to
 +
 
|- align="left" valign="top"
 
|- align="left" valign="top"
−
| style="border: 1px solid #010101" width="594" |
+
| width="594" style="border:1px solid #010101;" |  
−
<nowiki>!=</nowiki>
+
!=
−
| style="border: 1px solid #010101" width="594" |
+
 
 +
| width="594" style="border:1px solid #010101;" |  
 
Not equal to
 
Not equal to
 +
 
|- align="left" valign="top"
 
|- align="left" valign="top"
−
| style="border: 1px solid #010101" width="594" |
+
| width="594" style="border:1px solid #010101;" |  
 
&gt;
 
&gt;
−
| style="border: 1px solid #010101" width="594" |
+
 
 +
| width="594" style="border:1px solid #010101;" |  
 
Greater than
 
Greater than
 +
 
|- align="left" valign="top"
 
|- align="left" valign="top"
−
| style="border: 1px solid #010101" width="594" |
+
| width="594" style="border:1px solid #010101;" |  
 
&lt;
 
&lt;
−
| style="border: 1px solid #010101" width="594" |
+
 
 +
| width="594" style="border:1px solid #010101;" |  
 
Less than
 
Less than
 +
 
|- align="left" valign="top"
 
|- align="left" valign="top"
−
| style="border: 1px solid #010101" width="594" |
+
| width="594" style="border:1px solid #010101;" |  
 
&gt;=
 
&gt;=
−
| style="border: 1px solid #010101" width="594" |
+
 
 +
| width="594" style="border:1px solid #010101;" |  
 
Greater than or equal to
 
Greater than or equal to
 +
 
|- align="left" valign="top"
 
|- align="left" valign="top"
−
| style="border: 1px solid #010101" width="594" |
+
| width="594" style="border:1px solid #010101;" |  
 
&lt;=
 
&lt;=
−
| style="border: 1px solid #010101" width="594" |
+
 
 +
| width="594" style="border:1px solid #010101;" |  
 
Less than or equal to
 
Less than or equal to
  
−
Those relational operators cannot be applied to all data types and in some cases, two values of different types cannot be compared to each other.
+
|}
 +
 
 +
Those relational operators cannot be applied to all data types and in some cases, two values of different types cannot be compared to each other.  
  
−
{| class="tableintopic" style="border-collapse: collapse; border: 1px solid #010101" width="1189" border="1" cellpadding="2"
+
{| width="1189" cellspacing="0" cellpadding="2" border="1" class="tableintopic" style="border-collapse:collapse; border:1px solid #010101"
 
|- align="left" valign="top"
 
|- align="left" valign="top"
−
| style="border: 1px solid #010101" width="149" bgcolor="#C0C0C0" |
+
| width="149" bgcolor="#C0C0C0" style="border:1px solid #010101;" |  
 +
&nbsp;
  
−
| style="border: 1px solid #010101" width="149" bgcolor="#C0C0C0" |
+
| width="149" bgcolor="#C0C0C0" style="border:1px solid #010101;" |  
 
'''array'''
 
'''array'''
−
| style="border: 1px solid #010101" width="149" bgcolor="#C0C0C0" |
+
 
 +
| width="149" bgcolor="#C0C0C0" style="border:1px solid #010101;" |  
 
'''bool'''
 
'''bool'''
−
| style="border: 1px solid #010101" width="149" bgcolor="#C0C0C0" |
+
 
 +
| width="149" bgcolor="#C0C0C0" style="border:1px solid #010101;" |  
 
'''number'''
 
'''number'''
−
| style="border: 1px solid #010101" width="149" bgcolor="#C0C0C0" |
+
 
 +
| width="149" bgcolor="#C0C0C0" style="border:1px solid #010101;" |  
 
'''question'''
 
'''question'''
−
| style="border: 1px solid #010101" width="149" bgcolor="#C0C0C0" |
+
 
 +
| width="149" bgcolor="#C0C0C0" style="border:1px solid #010101;" |  
 
'''range'''
 
'''range'''
−
| style="border: 1px solid #010101" width="149" bgcolor="#C0C0C0" |
+
 
 +
| width="149" bgcolor="#C0C0C0" style="border:1px solid #010101;" |  
 
'''string'''
 
'''string'''
−
| style="border: 1px solid #010101" width="149" bgcolor="#C0C0C0" |
+
 
 +
| width="149" bgcolor="#C0C0C0" style="border:1px solid #010101;" |  
 
'''datetime'''
 
'''datetime'''
 +
 
|- align="left" valign="top"
 
|- align="left" valign="top"
−
| style="border: 1px solid #010101" width="149" bgcolor="#C0C0C0" |
+
| width="149" bgcolor="#C0C0C0" style="border:1px solid #010101;" |  
 
'''array'''
 
'''array'''
−
| style="border: 1px solid #010101" width="149" |
 
  
−
| style="border: 1px solid #010101" width="149" |
+
| width="149" style="border:1px solid #010101;" |
 +
&nbsp;
 +
 
 +
| width="149" style="border:1px solid #010101;" |
 +
&nbsp;
 +
 
 +
| width="149" style="border:1px solid #010101;" |  
 +
&nbsp;
  
−
| style="border: 1px solid #010101" width="149" |
+
| width="149" style="border:1px solid #010101;" |  
 +
&nbsp;
  
−
| style="border: 1px solid #010101" width="149" |
+
| width="149" style="border:1px solid #010101;" |
 +
==,&nbsp;!=
  
−
| style="border: 1px solid #010101" width="149" |
+
| width="149" style="border:1px solid #010101;" |  
−
<nowiki>==, !=</nowiki>
+
&nbsp;
−
| style="border: 1px solid #010101" width="149" |
 
  
−
| style="border: 1px solid #010101" width="149" |
+
| width="149" style="border:1px solid #010101;" |  
 +
&nbsp;
  
 
|- align="left" valign="top"
 
|- align="left" valign="top"
−
| style="border: 1px solid #010101" width="149" bgcolor="#C0C0C0" |
+
| width="149" bgcolor="#C0C0C0" style="border:1px solid #010101;" |  
 
'''bool'''
 
'''bool'''
−
| style="border: 1px solid #010101" width="149" |
 
  
−
| style="border: 1px solid #010101" width="149" |
+
| width="149" style="border:1px solid #010101;" |
−
<nowiki>==, !=</nowiki>
+
&nbsp;
−
| style="border: 1px solid #010101" width="149" |
+
 
−
<nowiki>==, !=</nowiki>
+
| width="149" style="border:1px solid #010101;" |  
−
| style="border: 1px solid #010101" width="149" |
+
==,&nbsp;!=
 +
 
 +
| width="149" style="border:1px solid #010101;" |  
 +
==,&nbsp;!=
 +
 
 +
| width="149" style="border:1px solid #010101;" |
 +
&nbsp;
 +
 
 +
| width="149" style="border:1px solid #010101;" |  
 +
&nbsp;
  
−
| style="border: 1px solid #010101" width="149" |
+
| width="149" style="border:1px solid #010101;" |
 +
==,&nbsp;!=
  
−
| style="border: 1px solid #010101" width="149" |
+
| width="149" style="border:1px solid #010101;" |  
−
<nowiki>==, !=</nowiki>
+
&nbsp;
−
| style="border: 1px solid #010101" width="149" |
 
  
 
|- align="left" valign="top"
 
|- align="left" valign="top"
−
| style="border: 1px solid #010101" width="149" bgcolor="#C0C0C0" |
+
| width="149" bgcolor="#C0C0C0" style="border:1px solid #010101;" |  
 
'''number'''
 
'''number'''
−
| style="border: 1px solid #010101" width="149" |
 
  
−
| style="border: 1px solid #010101" width="149" |
+
| width="149" style="border:1px solid #010101;" |
−
<nowiki>==, !=</nowiki>
+
&nbsp;
−
| style="border: 1px solid #010101" width="149" |
+
 
−
<nowiki>==, !=, &gt;, &lt;, &lt;=, &gt;=</nowiki>
+
| width="149" style="border:1px solid #010101;" |  
−
| style="border: 1px solid #010101" width="149" |
+
==,&nbsp;!=
  
−
| style="border: 1px solid #010101" width="149" |
+
| width="149" style="border:1px solid #010101;" |  
−
<nowiki>==, !=</nowiki>
+
==,&nbsp;!=, &gt;, &lt;, &lt;=, &gt;=
−
| style="border: 1px solid #010101" width="149" |
 
  
−
| style="border: 1px solid #010101" width="149" |
+
| width="149" style="border:1px solid #010101;" |
 +
&nbsp;
 +
 
 +
| width="149" style="border:1px solid #010101;" |
 +
==,&nbsp;!=
 +
 
 +
| width="149" style="border:1px solid #010101;" |
 +
&nbsp;
 +
 
 +
| width="149" style="border:1px solid #010101;" |  
 +
&nbsp;
  
 
|- align="left" valign="top"
 
|- align="left" valign="top"
−
| style="border: 1px solid #010101" width="149" bgcolor="#C0C0C0" |
+
| width="149" bgcolor="#C0C0C0" style="border:1px solid #010101;" |  
 
'''question'''
 
'''question'''
−
| style="border: 1px solid #010101" width="149" |
 
  
−
| style="border: 1px solid #010101" width="149" |
+
| width="149" style="border:1px solid #010101;" |  
 +
&nbsp;
  
−
| style="border: 1px solid #010101" width="149" |
+
| width="149" style="border:1px solid #010101;" |  
 +
&nbsp;
  
−
| style="border: 1px solid #010101" width="149" |
+
| width="149" style="border:1px solid #010101;" |  
 +
&nbsp;
  
−
| style="border: 1px solid #010101" width="149" |
+
| width="149" style="border:1px solid #010101;" |  
 +
&nbsp;
  
−
| style="border: 1px solid #010101" width="149" |
+
| width="149" style="border:1px solid #010101;" |  
 +
&nbsp;
  
−
| style="border: 1px solid #010101" width="149" |
+
| width="149" style="border:1px solid #010101;" |
 +
&nbsp;
 +
 
 +
| width="149" style="border:1px solid #010101;" |  
 +
&nbsp;
  
 
|- align="left" valign="top"
 
|- align="left" valign="top"
−
| style="border: 1px solid #010101" width="149" bgcolor="#C0C0C0" |
+
| width="149" bgcolor="#C0C0C0" style="border:1px solid #010101;" |  
 
'''range'''
 
'''range'''
−
| style="border: 1px solid #010101" width="149" |
 
−
<nowiki>==, !=</nowiki>
 
−
| style="border: 1px solid #010101" width="149" |
 
  
−
| style="border: 1px solid #010101" width="149" |
+
| width="149" style="border:1px solid #010101;" |  
−
<nowiki>==, !=</nowiki>
+
==,&nbsp;!=
−
| style="border: 1px solid #010101" width="149" |
 
  
−
| style="border: 1px solid #010101" width="149" |
+
| width="149" style="border:1px solid #010101;" |  
 +
&nbsp;
  
−
| style="border: 1px solid #010101" width="149" |
+
| width="149" style="border:1px solid #010101;" |
 +
==,&nbsp;!=
  
−
| style="border: 1px solid #010101" width="149" |
+
| width="149" style="border:1px solid #010101;" |
 +
&nbsp;
 +
 
 +
| width="149" style="border:1px solid #010101;" |
 +
&nbsp;
 +
 
 +
| width="149" style="border:1px solid #010101;" |
 +
&nbsp;
 +
 
 +
| width="149" style="border:1px solid #010101;" |  
 +
&nbsp;
  
 
|- align="left" valign="top"
 
|- align="left" valign="top"
−
| style="border: 1px solid #010101" width="149" bgcolor="#C0C0C0" |
+
| width="149" bgcolor="#C0C0C0" style="border:1px solid #010101;" |  
 
'''string'''
 
'''string'''
−
| style="border: 1px solid #010101" width="149" |
 
  
−
| style="border: 1px solid #010101" width="149" |
+
| width="149" style="border:1px solid #010101;" |
−
<nowiki>==, !=</nowiki>
+
&nbsp;
−
| style="border: 1px solid #010101" width="149" |
+
 
−
<nowiki>==, !=</nowiki>
+
| width="149" style="border:1px solid #010101;" |  
−
| style="border: 1px solid #010101" width="149" |
+
==,&nbsp;!=
 +
 
 +
| width="149" style="border:1px solid #010101;" |  
 +
==,&nbsp;!=
 +
 
 +
| width="149" style="border:1px solid #010101;" |
 +
&nbsp;
 +
 
 +
| width="149" style="border:1px solid #010101;" |  
 +
&nbsp;
  
−
| style="border: 1px solid #010101" width="149" |
+
| width="149" style="border:1px solid #010101;" |
 +
==,&nbsp;!=
  
−
| style="border: 1px solid #010101" width="149" |
+
| width="149" style="border:1px solid #010101;" |  
−
<nowiki>==, !=</nowiki>
+
&nbsp;
−
| style="border: 1px solid #010101" width="149" |
 
  
 
|- align="left" valign="top"
 
|- align="left" valign="top"
−
| style="border: 1px solid #010101" width="149" bgcolor="#C0C0C0" |
+
| width="149" bgcolor="#C0C0C0" style="border:1px solid #010101;" |  
 
'''datetime'''
 
'''datetime'''
−
| style="border: 1px solid #010101" width="149" |
 
  
−
| style="border: 1px solid #010101" width="149" |
+
| width="149" style="border:1px solid #010101;" |
 +
&nbsp;
 +
 
 +
| width="149" style="border:1px solid #010101;" |
 +
&nbsp;
 +
 
 +
| width="149" style="border:1px solid #010101;" |  
 +
&nbsp;
  
−
| style="border: 1px solid #010101" width="149" |
+
| width="149" style="border:1px solid #010101;" |  
 +
&nbsp;
  
−
| style="border: 1px solid #010101" width="149" |
+
| width="149" style="border:1px solid #010101;" |  
 +
&nbsp;
  
−
| style="border: 1px solid #010101" width="149" |
+
| width="149" style="border:1px solid #010101;" |  
 +
&nbsp;
  
−
| style="border: 1px solid #010101" width="149" |
+
| width="149" style="border:1px solid #010101;" |
 +
==,&nbsp;!=, &gt;, &lt;, &lt;=, &gt;=
  
−
| style="border: 1px solid #010101" width="149" |
+
|}
−
<nowiki>==, !=, &gt;, &lt;, &lt;=, &gt;=</nowiki>
 
  
−
The logical operators are shown next:
+
The logical operators are shown next:  
  
−
{| class="tableintopic" style="border-collapse: collapse; border: 1px solid #010101" width="1189" border="1" cellpadding="2"
+
{| width="1189" cellspacing="0" cellpadding="2" border="1" class="tableintopic" style="border-collapse:collapse; border:1px solid #010101"
 
|- align="left" valign="top"
 
|- align="left" valign="top"
−
| style="border: 1px solid #010101" width="594" bgcolor="#C0C0C0" |
+
| width="594" bgcolor="#C0C0C0" style="border:1px solid #010101;" |  
 
'''Operator'''
 
'''Operator'''
−
| style="border: 1px solid #010101" width="594" bgcolor="#C0C0C0" |
+
 
 +
| width="594" bgcolor="#C0C0C0" style="border:1px solid #010101;" |  
 
'''Meaning'''
 
'''Meaning'''
 +
 
|- align="left" valign="top"
 
|- align="left" valign="top"
−
| style="border: 1px solid #010101" width="594" |
+
| width="594" style="border:1px solid #010101;" |  
 
&amp;&amp;
 
&amp;&amp;
−
| style="border: 1px solid #010101" width="594" |
+
 
 +
| width="594" style="border:1px solid #010101;" |  
 
Logical and
 
Logical and
 +
 
|- align="left" valign="top"
 
|- align="left" valign="top"
−
| style="border: 1px solid #010101" width="594" |
+
| width="594" style="border:1px solid #010101;" |
−
<nowiki>||</nowiki>
+
&#124;&#124;
−
| style="border: 1px solid #010101" width="594" |
+
 
 +
| width="594" style="border:1px solid #010101;" |  
 
Logical or
 
Logical or
 +
 
|- align="left" valign="top"
 
|- align="left" valign="top"
−
| style="border: 1px solid #010101" width="594" |
+
| width="594" style="border:1px solid #010101;" |
−
<nowiki>!</nowiki>
+
!
−
| style="border: 1px solid #010101" width="594" |
+
 
 +
| width="594" style="border:1px solid #010101;" |  
 
Logical negation
 
Logical negation
  
−
The outcome of the relational and logical operators is a value of type bool.
+
|}
−
__NOTOC__
+
 
−
<!-- imported from file: 261.htm-->
+
The outcome of the relational and logical operators is a value of type bool.  
 +
 
 +
[[Category:Operators]]

Revision as of 08:18, 5 January 2012



Relational and Logical Operators

Relational refers to the relationships that values can have with one another, and logical refers to the ways in which true and false values can be connected together. Since the relational operators produce true or false results, they are often used in combination with the logical operators.

The relational operators are as follows:

Operator

Meaning

==

Equal to

=

Not equal to

>

Greater than

<

Less than

>=

Greater than or equal to

<=

Less than or equal to

Those relational operators cannot be applied to all data types and in some cases, two values of different types cannot be compared to each other.

 

array

bool

number

question

range

string

datetime

array

 

 

 

 

=, !

 

 

bool

 

=, !

=, !

 

 

=, !

 

number

 

=, !

=, !=, >, <, <=, >

 

=, !

 

 

question

 

 

 

 

 

 

 

range

=, !

 

=, !

 

 

 

 

string

 

=, !

=, !

 

 

=, !

 

datetime

 

 

 

 

 

 

=, !=, >, <, <=, >

The logical operators are shown next:

Operator

Meaning

&&

Logical and

||

Logical or

Logical negation

The outcome of the relational and logical operators is a value of type bool.

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