MATLAB Type Conversion

🔄 MATLAB Type Conversion

MATLAB is developed by MathWorks.

🔹 Why Type Conversion Is Needed?

• To match function requirements

• To save memory

• To format output

• To avoid runtime errors

MATLAB supports both implicit and explicit type conversion.

1️⃣ Implicit Type Conversion

MATLAB automatically converts data types when required.

🔸 Example

Output

📌 MATLAB converts int8 to double automatically.

2️⃣ Explicit Type Conversion

You manually convert data types using conversion functions.

🔢 Numeric Type Conversion

🔸 Double → Integer

Output

📌 Decimal part is truncated, not rounded.

🔸 Integer → Double

Output

🔸 Double → Single

Output

🔤 Numeric ↔ String Conversion

🔸 Number → String

Output

🔸 String → Number

Output

🔤 char ↔ string Conversion

🔸 char → string

Output

🔸 string → char

Output

🔘 Logical Type Conversion

🔸 Logical → Numeric

Output

🔸 Numeric → Logical

Output

🧬 Check Data Type

⚠️ Important Notes

• Integer conversion removes decimals

• Default numeric type is double

• str2double() returns NaN if conversion fails

• Use explicit conversion to avoid errors

🎯 Interview Questions: MATLAB Type Conversion

🔹 Q1. What is type conversion in MATLAB?

Answer: Converting one data type into another.

🔹 Q2. What is implicit type conversion?

Answer: Automatic conversion done by MATLAB during operations.

🔹 Q3. Which function converts number to string?

Answer: num2str()

🔹 Q4. Which function converts string to number?

Answer: str2double()

🔹 Q5. What happens when double is converted to integer?

Answer: Decimal part is truncated.

🔹 Q6. How do you check data type in MATLAB?

Answer: Using class() or whos.

🔹 Q7. Can logical values be converted to numbers?

Answer: Yes (true → 1, false → 0).

🔹 Q8. What is the default numeric data type after conversion?

Answer: double

✅ Summary Table