Even numbers can be expressed as 2n numbers (n is a positive integer). Even numbers must be divisible by 2. It is worth noting that 0 is an even number (in 2002, the International Mathematical Association stipulated that 0 is an even number, and in 2004, China also stipulated that 0 is an even number).

In computer science, 0 is usually used to represent "false" Boolean values. The database of the computer consists of binary, namely 0 and 1. When the circuit transmits data, 0 and 1 represent low potential and high potential respectively. The on-off of the switch indicates 0 and 1.

In programming languages, if the number of arrays is 4, then its actual members are 0 to 3, not 1 to 4. In C language, 0 is put before integer constant to represent octal number, while integer hexadecimal number usually starts with 0x.

Extended data:

history

In 3000 BC, the Babylonians knew how to use zero to avoid chaos. As early as 2000 BC in ancient Egypt, some people used special symbols to record zeros in bookkeeping. Maya civilization first invented the special font 0. In Mayan numerals, 0 is represented by a pictographic symbol like a shell.

The standard number 0 was invented by ancient Indians around the 5th century. They first used a black dot to represent zero, and then gradually became "0".