# Notes on Data Type Conversion

- When casting between signed and unsigned integers of the same data size, the bit representation doesn’t change but the interpretation of the bits change.
- Positive integers have the same bit representation regardless if they are signed or unsigned, but of course the interpretation is different.
- For arithmetic operation:
- If one of the operands is long double, then the other is converted to long double
- Else if one of the operands is double, then the other is converted to double
- Else if one of the operands is float, then the other is converted to float
- Else if one of the operands is long int, then the other is converted to long int
- Else if one of the operands is int, then the other is converted to int