160 in binary is 10100000. Binary is a base-2 numeral system, which means that it uses two symbols, 0 and 1, to represent numbers. Each digit in a binary number represents a power of 2. For example, the first digit from the right represents 2^0, the next digit represents 2^1, and so on.

To convert a decimal number to binary, you can use long division. Divide the decimal number by 2 repeatedly, and write down the remainders in reverse order. For example, to convert 160 to binary, we would do the following:

## Code snippet

```
160 / 2 = 80 with a remainder of 0
80 / 2 = 40 with a remainder of 0
40 / 2 = 20 with a remainder of 0
20 / 2 = 10 with a remainder of 0
10 / 2 = 5 with a remainder of 0
5 / 2 = 2 with a remainder of 1
2 / 2 = 1 with a remainder of 0
```

The remainders in reverse order are 0, 0, 0, 0, 1, 2, 1. Therefore, 160 in binary is 10100000.

Binary numbers are used in computers and other digital devices. They are also used in cryptography and other fields.