Representation of Numbers and Characters in Computer

This chapter covers the computer representation of numbers and characters. Computers use binary number system. Everything is represented by binary numbers in computer. Information is expressed using symbols that include characters, numbers, and symbols other than characters. Every symbol and number is represented by 7-bit ASCII codes. ASCII representation of positive numbers is the same as their binary representation. However, negative numbers are represented in 2’s complement form in most of the electronic devices, including computers.