Learning objective
Parameters of subroutines: Be able to describe the use of parameters to pass data within programs. Be able to use subroutines with interfaces.
Read the explanation, check the common trap, then practise with flashcards and questions.
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Topic
Programming
Subtopic
Parameters of subroutines
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Quick explanation
Parameters of subroutines: Be able to describe the use of parameters to pass data within programs. Be able to use subroutines with interfaces
- This point belongs to Programming, especially Parameters of subroutines.
- You need to be able to parameters of subroutines: Be able to describe the use of parameters to pass data within programs. Be able to use subroutines with interfaces.
- Use the linked flashcards and practice questions to check recall, then practise applying the idea in an exam-style answer.
Why it matters
This objective helps connect Parameters of subroutines to exam-style questions, flashcards, and revision notes for Programming.
Quick student answer
What is the main purpose of a parameter in a subroutine?
Direct answer
A parameter provides a way for data to be passed to a subroutine when it is called.
Key terms
- Parameter: A named variable in a subroutine definition that receives a value passed into the subroutine.
- Subroutine interface: The way a subroutine is accessed, including its name and the parameters that callers must supply.
Common trap
Supplying the wrong number of arguments: Compare the call with the subroutine definition and supply one appropriate argument for each required parameter, in the correct order.
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Related learning objectives
- Data types: Understand the concept of a data type. Understand and use the following appropriately: • integer • real/float • Boolean • character • string • date/time • pointer/reference • records (or equivalent) • arrays (or equivalent). Variables declared as a pointer or reference data type are used as stores for memory addresses of objects created at runtime, ie dynamically. Not all languages support explicit pointer types, but students should have an opportunity to understand this data type. Define and use user-defined data types based on language-defined (built-in) data types.
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- Arithmetic operations in a programming language: Be familiar with and be able to use: • addition • subtraction • multiplication • real/float division • integer division, including remainders • exponentiation • rounding • truncation. 42
Arithmetic operations in a programming language
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Relational operations in a programming language
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