Boolean: Difference between revisions

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In PHP:  
In PHP:  
<syntaxhighlight lang="php">
<syntaxhighlight lang="PHP">
<?php
<?php
$myFirstVar = True; // assign the value TRUE to $myFirstVar
$myFirstVar = True; // assign the value TRUE to $myFirstVar
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In Python:  
In Python:  
<syntaxhighlight lang="phython">
<syntaxhighlight lang="Phython">
myFirstVar = True
myFirstVar = True
myOtherVar = False
myOtherVar = False
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In Javascript:  
In Javascript:  
<syntaxhighlight lang="javascript">
<syntaxhighlight lang="JavaScript">
var myFirstVar = true;
var myFirstVar = true;
var myOtherVar = false;
var myOtherVar = false;

Revision as of 15:03, 29 June 2019

Programming basics[1]

In most computer programming languages, a Boolean data type is a data type with only two possible values: true or false.[2]

By convention we can express true as the integer 1 and false as the integer 0 (zero). Please be careful as some programming languages treat an empty or unset value as FALSE.

Please know it is very common to use booleans to test for a condition. If something is TRUE then select the true option, if something is FALSE, then select the false option.

Example[edit]

In PHP:

<?php
$myFirstVar = True; // assign the value TRUE to $myFirstVar
$myOtherVar = False; // assign the value FALSE to $myOtherVar
?>


In Python:

myFirstVar = True
myOtherVar = False

In Javascript:

var myFirstVar = true;
var myOtherVar = false;

See Also[edit]

Boolean operators

Standards[edit]

  • Define the terms: variable, constant, operator, object.

References[edit]