- A function is defined as a built in formula to accomplish certain task such as mathematical, statistical, financial, logical or data calculation etc.
- A built in function is the reserved or ready made function of QBasic system which can be called by programmer.
- It is also called library functions.
- Eg. RIGHT$, UCASE$, LEFT$, MID$, ABS( ), SQR( ), SIN(X), etc.
