and: Difference between revisions

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m (Text replacement - "<code>([^<]*)\[\[([a-zA-Z][a-zA-Z0-9_]+)\]\]([^<]*) *<\/code>" to "<code>$1$2$3</code>")
m (Text replacement - "\|x([0-9])= *<code>([^<]*)<\/code>" to "|x$1= <sqf>$2</sqf>")
Line 49: Line 49:
|r2= [[Boolean]]
|r2= [[Boolean]]


|x1= <code>if ((not isNull player) and (alive player) and (_enemycount == 0)) then
|x1= <sqf>if ((not isNull player) and (alive player) and (_enemycount == 0)) then
{
{
hint "you win !";
hint "you win !";
};</code>
};</sqf>


|x2= <code>if ((count _array > 0) and { (_array select 0) == player }) then // works as expected
|x2= <sqf>if ((count _array > 0) and { (_array select 0) == player }) then // works as expected
{
{
hint "It works!";
hint "It works!";
Line 62: Line 62:
{
{
hint "It... works?";
hint "It... works?";
};</code>
};</sqf>


|seealso= [[a && b]] [[or]] [[Operators]]
|seealso= [[a && b]] [[or]] [[Operators]]
}}
}}

Revision as of 10:21, 13 May 2022

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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
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