Casting
Computer Science: OCR A Level, topic 4.1.2
Casting
Casting is the process of converting data from one type to another.
Reasons for casting
- One of the most common reasons for casting is output.
- Output must be formatted as a string, and so we may need to convert a certain piece of data to a string.
- All input also comes as a string, and must then be converted to other data types.
Casting functions
- Casting to a string can be done using the str function. E.g:
- str(3) gives "3".
- Casting to an integer can be done using the int function. E.g:
- int(3.4) gives 3.
- Casting to a float can be done using the float function. E.g:
- float("3.4") gives 3.4.
Test yourself on Casting
What is one of the most common reasons for casting?