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  /statelake/scripting-reference/functions-and-procedures/what-is-a-function/calling-functions.md
---

# Calling Functions

Writing and naming a function does not actually allow it to run. All functions need to be enveloped in a *script wrapper* or envelope, within a special procedure name that is recognised by **Statelake**. Please refer to [What Is A Procedure](/statelake/scripting-reference/functions-and-procedures/what-is-a-procedure/) for more information.

Functions are called in a statement block between a **begin** and **end** statement.

You use a function within your script simply by entering its name and providing the appropriate parameters (or arguments) - this is known as a function call.

A function is activated by the evaluation of an expression that contains its call, and returns a value to that expression.

The following example calls the function **IntToStr** and passes in a single parameter contained in **MyFloatVariable**, assigning the result to the variable called Value.

```pascal
Value := IntToStr(MyFloatVariable);
```

When calling a function that has multiple parameters, these parameters are separated by a comma such as in this call below – the function **TaxAmount** passes in two parameters (the value in the variable **MyTotalVariable** and the value of **12.75**). The result is returned to the variable called **Value**.

```pascal
Value := TaxAmount(MyTotalVariable,12.75);
```

Normally a function is used on the right-hand side of an assignment operator :=. This assigns the result of the function to the variable on the left of the assignment operator.