What is the ASCII code chart? Codes 0 to 31 are not used for characters They are called control characters because they are used for actions like: Carriage return (CR). Bell (BEL). Codes 65 to 90 ...

For example, the ASCII code for uppercase A is 65 and for lowercase a is 97. Most computers use ASCII codes to represent text, which makes it possible to transfer data from one computer to another.