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url: >-
  /statelake/scripting-reference/functions-and-procedures/parameters-or-arguments/procedure-parameters.md
---

# Procedure Parameters

A **Procedure** is a sub-routine that does not return a value. Any results obtained from the execution of a **Procedure** are either contained in one or more output arguments, or have another purpose such as writing something to the screen or writing to a file.

In this simple example of a **Procedure** called **FindTheName**, the parameter is **TheDetails**.

```pascal
procedure FindTheName(TheDetsils : string);
```

Or this more In this example of a **Procedure** called **FindTheName**, the parameter is **TheDetails**.

```pascal
procedure WhatTime(dateTime : TDateTime);
 begin
 //Display the date and time passed to the routine
  LogInfo('Date and time is '+DateTimeToStr(dateTime));
 end;
```

If a **Procedure** accepts multiple parameters they should be separated with commas such as in the following example.

```pascal
procedure ShowSum(a, b : integer);
var
  total : integer;
begin
 //Add the two numbers together
  total := a + b;
 //And display the sum
  LogInfo('%d + %d = %d',[a,b,total]);
end;
```

A combination of keywords can be used in a Procedure - for instance as the following shows, you can use the *const* and *out* keywords in the one **Procedure**. And this **Procedure** called **CopyStr** can then itself be called in the following **Procedure**.

```pascal
procedure CopyStr(const AStr : String; out AOutStr : String);
begin
  AOutStr := AStr;
end;

procedure ScriptEvent (var Value : variant);
var
  SomeStr, WhatStr: String;
begin
  SomeStr := 'Hello World';
  CopyStr(SomeStr, WhatStr);
  LogInfo(WhatStr);
end;
```