From Computer Science Wiki
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.



$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


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