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	==Definition==		==Definition==
-	'''INT''' Exists ( <'''INT''' processID|processType> )	+	'''INT''' Exists ( <'''INT''' processID|processTypeID> )
-	Checks if a [[process]] is alive.	+	Checks if a [[process]] is alive, using its [[processID]] or checks if there is a process alive of a certain [[processType]], using its [[processTypeID]].
	== Parameters ==		== Parameters ==
	{|		{|
-	| '''INT''' processID or processType || - The ID or Type of the process to be checked.	+	| '''INT''' processID<nowiki>|</nowiki>processTypeID || - The ProcessID of the process or the ProcessTypeID of the type of processes to be checked.
	|}		|}
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	'''INT''' : The result of the check		'''INT''' : The result of the check
	{|		{|
-	| 0 (false) || - The process with given processID is not alive or there are no processes alive of the given type.	+	| 0 (false) || - The process with given processID is not alive or there are no processes alive of the given processTypeID.
	|-		|-
-	| 1 (true) || - The process with given processID is alive or there is at least one process alive of the given type.	+	| 1 (true) || - The process with given processID is alive or there is at least one process alive of the given processTypeID.
	|}		|}
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	</pre>		</pre>
	Used in example: [[Say]]()		Used in example: [[Say]]()
		+
		+	{{Funcbox
		+	| category = Processinteraction
		+	}}

---

Current revision

Contents 1 Definition 2 Parameters 3 Returns 4 Example

[edit] Definition

INT Exists ( <INT processID|processTypeID> )

Checks if a process is alive, using its processID or checks if there is a process alive of a certain processType, using its processTypeID.

[edit] Parameters

INT processID|processTypeID

- The ProcessID of the process or the ProcessTypeID of the type of processes to be checked.

[edit] Returns

INT : The result of the check

0 (false)	- The process with given processID is not alive or there are no processes alive of the given processTypeID.
1 (true)	- The process with given processID is alive or there is at least one process alive of the given processTypeID.

[edit] Example

Program example;
Begin

    Proc();

    if(exists(id))
        say("I exist!");
    end
    if(exists(type main))
        say("I exist!");
    end
    if(exists(0))
        say("0 doesn't exist");
    end
    if(exists(type proc))
        say("Proc exists!");
    else
        say("Proc doesn't exist!");
    end

    Loop
        frame;
    End
End

Process Proc()
Begin
    Loop
        frame;
    End
End

Used in example: Say()

Processinteraction Functions

• Advance() • Collision() • Exists() • Get_angle() • Get_dist() • Get_id() • Let_me_alone() • Signal() • Xadvance() •