MATLAB Data Types

🧬 MATLAB Data Types

MATLAB is developed by MathWorks.

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🔹 What Are Data Types in MATLAB?

A data type specifies:

• The type of data

• The size in memory

• The operations that can be performed

MATLAB automatically assigns data types when values are stored.

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📂 Main MATLAB Data Types

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1️⃣ Numeric Data Types

Used to store numbers.

🔸 Example

🔸 Check Type

📌 Output

📍 Default numeric type in MATLAB is double.

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🔹 Other Numeric Types

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2️⃣ Character (char) Data Type

Used to store text using single quotes.

🔸 Example

📌 Output

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3️⃣ String Data Type

Used to store text using double quotes.

🔸 Example

📌 Output

📍 Strings support advanced text operations.

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4️⃣ Logical Data Type

Used for true/false values.

🔸 Example

📌 Output

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5️⃣ Vector Data Type

A one-dimensional array.

🔸 Example

📌 Output

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6️⃣ Matrix Data Type

Two-dimensional array.

🔸 Example

📌 Output

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7️⃣ Cell Array

Stores different data types together.

🔸 Example

📌 Output

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8️⃣ Structure (struct)

Stores related data as fields.

🔸 Example

📌 Output

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🔍 Checking Data Type

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🔄 Type Conversion

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🎯 Interview Questions on MATLAB Data Types

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🔹 Q1. What is the default numeric data type in MATLAB?

Answer: double

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🔹 Q2. Difference between char and string in MATLAB?

Answer:

• char uses single quotes ' '

• string uses double quotes " " and supports advanced operations

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🔹 Q3. What data type stores true/false values?

Answer: Logical data type.

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🔹 Q4. What function is used to check data type?

Answer: class()

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🔹 Q5. Can It store multiple data types in one variable?

Answer: Yes, using cell arrays and structures.

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🔹 Q6. How do you convert numeric to string?

Answer: Using num2str().

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🔹 Q7. What is the difference between vector and matrix?

Answer:

• Vector → 1D array

• Matrix → 2D array

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🔹 Q8. Which command shows variable size and data type?

Answer: whos

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✅ Summary Table