Function Arguments in MATLAB

🎯 Function Arguments in MATLAB

They make functions flexible, reusable, and powerful.
MATLAB is developed by MathWorks.

🔹 What Are Function Arguments?

• Input arguments → values passed into a function

• Output arguments → values returned from a function

1️⃣ Single Input Argument

🔸 Function

🔸 Call

Output

2️⃣ Multiple Input Arguments

🔸 Function

🔸 Call

Output

3️⃣ Multiple Output Arguments

🔸 Function

🔸 Call

Output

4️⃣ Function with No Input Arguments

🔸 Function

🔸 Call

Output

5️⃣ Function with No Output Arguments

🔸 Function

🔸 Call

Output

6️⃣ Optional Arguments Using nargin

nargin returns the number of input arguments passed.

🔸 Calls

Output

7️⃣ Number of Outputs Using nargout

nargout returns the number of outputs requested.

🔸 Call

Output

📌 Only first output is returned.

8️⃣ Default Values for Arguments

🔸 Call

Output

⚠️ Important Rules

• Input arguments are comma-separated

• Output arguments use square brackets [ ]

• Order of arguments matters

• Variables inside functions are local

🎯 Interview Questions: Function Arguments in MATLAB

🔹 Q1. What are function arguments?

Answer:
Values passed to and returned from a function.

🔹 Q2. How do you pass multiple inputs to a function?

Answer:
Using commas: fun(a, b, c).

🔹 Q3. How do you return multiple outputs?

Answer:
Using square brackets: [x, y] = fun(a, b).

🔹 Q4. What does nargin do?

Answer:
Returns the number of input arguments.

🔹 Q5. What does nargout do?

Answer:
Returns the number of output arguments requested.

🔹 Q6. Can MATLAB functions have default arguments?

Answer:
Yes, using nargin.

🔹 Q7. Are function arguments local or global?

Answer:
Local to the function.

✅ Summary

• Arguments control function flexibility

• MATLAB supports multiple inputs & outputs

• nargin and nargout add robustness

• Essential for modular programming