A 0 or 1 in a binary number is called a bit. A binary number is made up of only ones and zeroes.
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I'm pretty sure binary is just 1's and 0's
All numbers can be represented in a binary number system. Binary is the base 2 number system, meaning that there 2 possible values per place: 0 and 1. A decimal system allows for 10: 0, 1, 2, 3, 4, 5, 6, 7, 8, and 9. In a decimal system, you carry out and add a space once you pass 9. Thus, you end up with a 1 in the second place and a 0 in the first. The first space then counts up again. Similarly, a binary system adds a place when it reaches 2. In a decimal system, there are 10x numbers which can be represented by a system with x places. In binary, there are 2x possible numbers. If the number of places is infinite, an infinite number of values can be represented. Negative numbers can be represented in a variety of ways, from a dash as is commonly used in decimal to a 2's complement to a sign bit (i.e. a 1 or a 0 which will tell the reader or the machine the sign of the number).
A denary number is a number based on the ten digits, from 0 to 9. This is in contrast to the binary system used in computing, which consists entirely of 0s and 1s.
The binary number 10011 is equivalent to the decimal number 19 in the base-10 number system. In binary, each digit represents a power of 2, starting from the right with 2^0, 2^1, 2^2, and so on. Therefore, 12^4 + 02^3 + 02^2 + 12^1 + 1*2^0 = 16 + 0 + 0 + 2 + 1 = 19.
There is no largest number, either decimal or binary.