# What is a digit?

The question that arises not everyone and not always - what is a figure? Most often, parents first respond to him, and then teachers in a school or kindergarten. The word "figure" came from the Latin "cifra" and from the Arabic "sifr", which means - empty or zero.

## What is the number and number

The Dahl dictionary says that a number is a numeric character. In other words, numbers are signs of numbers, just as letters are signs of sounds.

How many numbers do we know? That's right, only 10 and we know them as such - 1, 2, 3, 4, 5, 6, 7, 8, 9, 0. And numbers - infinity, because a combination of numbers “produces” multi-digit numbers, for example 12, 958 , 1054630 and so on.

Natural numbers are used to list (first, second, and so on) and to denote the number of items (one item, two items, ...).

### What other numbers are

- Arabic numerals. We use these signs as much as we remember (and not only ourselves). Europeans, they became known in the X century. Pope Sylvester II was one of the first to become acquainted with these “simple” figures and began to promote their introduction into life, since he understood the convenience of using them.
- Roman numerals. They appeared even among the Etruscans (the tribes that lived in the north-west of the Apennine Peninsula, now Tuscany, still a thousand years before our era) and 5 centuries before our era. They are written as I, II, III, IV, V, VI, VII, VIII, IX, X. It is interesting that the number “IV” known to us began to be written in this way only in the XIX (19) century, previously they wrote “IIII”.
- Maya figures. Their record was based on the twenty-point positional system, and it was used for calendar calculations. In everyday life they used a system similar to the ancient Egyptian (hieroglyphic symbols).

Now for the modern person the figure is not only a mathematical sign. There was digital television (we know that this is a better image and sound than analog). Digital format is a type of signal in electronics. For example, in cameras, it is used to save data in a digital (binary) format, that is, colors are described by bits (a unit of measure for the amount of information).

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