Can you explain what ASCII encoding is and what it is used for?

ASCII (American Standard Code for Information Interchange) is a character encoding standard that assigns a unique number from 0 to 127 to each character. It is used to represent text data in computers and communication devices.

For example, the letter 'A' corresponds to the number 65, and the symbol '0' to 48. This allows storing and transmitting text as numbers.

In programming, ASCII is often used for processing and comparing characters, as well as for compatibility with various systems and protocols.

Example in Go:

var ch byte = 'A' // ch == 65
fmt.Println(ch)    // Will output: 65

ASCII only covers the English alphabet, digits, and some special characters, so for other languages and symbols, extended encodings like UTF-8 are used.