# Parameter passing and input validation

> When you create methods (procedures and functions), you need a way to send data into them and ensure that the data is correct before processing it. Parameter passing controls how data moves between…

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## Full notes

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## More in User-defined methods

- [Procedures and functions](https://www.hlayiso.com/grade-11/information-technology/notes/user-defined-methods/procedures-and-functions) — Previous section
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## Frequently asked questions

### What will I learn in "Parameter passing and input validation"?

This section covers Parameter passing and input validation as part of User-defined methods in Grade 11 Information Technology. You'll find clear explanations, worked examples, and key definitions aligned to the CAPS curriculum.

### Is this section aligned with the CAPS curriculum?

Yes. All notes on Hlayiso, including "Parameter passing and input validation", are written against the official CAPS curriculum and ATP for Grade 11 Information Technology.

### What should I study after "Parameter passing and input validation"?

Continue with the next section in User-defined methods, or test your understanding with the interactive quiz linked to this section.

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