and: Difference between revisions

From Bohemia Interactive Community
Jump to navigation Jump to search
No edit summary
 
m (Text replacement - "(\|[pr][0-9]+ *= *[^- ]*) *- *T([a-z ])" to "$1 - t$2")
 
(113 intermediate revisions by 16 users not shown)
Line 1: Line 1:
back to [[Scripting_Reference#A|COMREF]]
{{RV|type=command


<h2 style="color:#000066">'''''a'' and ''b'''''</h2>
|game1= ofp
|version1= 1.00


|game2= ofpe
|version2= 1.00


'''Operand types:'''
|game3= arma1
|version3= 1.00


'''a:''' [[Boolean]]
|game4= arma2
|version4= 1.00


'''b:''' [[Boolean]]
|game5= arma2oa
|version5= 1.50


'''Type of returned value:'''
|game6= tkoh
|version6= 1.00


[[Boolean]]
|game7= arma3
|version7= 0.50


'''Description:'''
|gr1= Variables


'''a''' and '''b'''
|gr2= Math


|descr= Returns [[true]] only if both conditions are [[true]].
In case of the alternative syntax, {{Link|https://en.wikipedia.org/wiki/Lazy_evaluation#Control_structures|lazy evaluation}} is used - if left operand is [[false]], evaluation of the right side is ignored.


'''Example:'''
|alias= [[a && b]]


alive player '''and''' alive leader player
|s1= a [[and]] b
 
|p1= a: [[Boolean]] - test condition or variable
 
|p2= b: [[Boolean]] - test condition or variable
 
|r1= [[Boolean]]
 
|s2= a [[and]] b
 
|s2since= arma2oa 1.62
 
|p21= a: [[Boolean]] - test condition or variable
 
|p22= b: [[Code]] - code that returns [[Boolean]]. It is '''not''' evaluated if ''a'' is [[false]]
 
|r2= [[Boolean]]
 
|x1= <sqf>
if ((not isNull player) and (alive player) and (_enemycount == 0)) then
{
hint "you win !";
};
</sqf>
 
|x2= <sqf>
if ((count _array > 0) and { (_array select 0) == player }) then // works as expected
{
hint "It works!";
};
 
if ((count _array > 0) and (_array select 0) == player) then // Error: _array select 0 is evaluated
{
hint "It... works?";
};
</sqf>
 
|seealso= [[a && b]] [[or]] [[Operators]]
}}

Latest revision as of 16:51, 8 November 2023

Logo A0.png1.00ofpe logo.png1.00Logo A1 black.png1.00Logo A2.png1.00A2 OA Logo.png1.50tkoh logo small.png1.00Arma 3 logo black.png0.50
Hover & click on the images for description

Description

Description:
Returns true only if both conditions are true. In case of the alternative syntax, lazy evaluation is used - if left operand is false, evaluation of the right side is ignored.
Alias:
a && b
Groups:
VariablesMath

Syntax

Syntax:
a and b
Parameters:
a: Boolean - test condition or variable
b: Boolean - test condition or variable
Return Value:
Boolean

Alternative Syntax

Syntax:
a and b
Parameters:
a: Boolean - test condition or variable
b: Code - code that returns Boolean. It is not evaluated if a is false
Return Value:
Boolean

Examples

Example 1:
if ((not isNull player) and (alive player) and (_enemycount == 0)) then { hint "you win !"; };
Example 2:
if ((count _array > 0) and { (_array select 0) == player }) then // works as expected { hint "It works!"; }; if ((count _array > 0) and (_array select 0) == player) then // Error: _array select 0 is evaluated { hint "It... works?"; };

Additional Information

See also:
a && b or Operators

Notes

Report bugs on the Feedback Tracker and/or discuss them on the Arma Discord or on the Forums.
Only post proven facts here! Add Note
Retrieved from "https://community.bistudio.com/wiki?title=and&oldid=349274"