# A symbol used to write a number

We will look at natural and whole numbersintegersrational numbersirrational numbersreal numbersimaginary numbers and complex numbers. The Natural and Whole Numbers We start with the natural numbers. These are the numbers 1, 2, 3, … The … symbol means that the sequence goes on forever.

Comment by Anonymous This information is incorrect. The decimal separator is not a dot in English, but in the United States and the United Kingdom, in South Africa where the official language is English for example they use the comma as the decimal separator, just like most of the rest of the civilised world.

## Number sign - Wikipedia

Anyway, I updated the article to make it more precise. Comment by Anonymous wrong wrong wrong!

Comment by abdul rahimov 11 incidentally in russia, the separator for thousands -- 3 digit increments -- is the period, while the separator for decimals is the comma.

Comment by Travis Question, in the US, a number like Also there has been heavy dispute on common practice vs. Comment by Eden Thank you for the article. As a American scientist and bilingual technical communicator, I am often troubled on how to make sure my figures are correctly interpreted.

## Cultural associations of some numbers

In response, to Travis: In German, the numbering is also this way, vierundzwanzig. Comment by Peter In fact Anonymous is partly right.

British Standard now superceded by BS introduced the European standard of writing numbers in the early s about the same time that the UK abandoned the long billion.

BS was originally primarily for technical drawings, but I believe that BS extends to other documentation relating to design.

There has been some spread of the European type format for numbers outside of the realm of physical engineering. So, in engineering in the UK, the decimal point, ". Unfortunately, none of this seems to be taught in schools, so a quick re-education of new newcomers to engineering is the norm.

I hope that the old UK system of writing numbers gives way to the more sensible, more common standard in the same way that feet and pounds are disappearing in favour of metres and kilograms.Numbers and Symbols Chapter 1 - Numeration Systems.

First, we have to distinguish the difference between numbers and the symbols we use to represent numbers. A number is a mathematical quantity, usually correlated in electronics to a physical quantity such as voltage, current, or resistance. There are many different types of numbers. The pentagram is a five pointed star commonly associated with Wicca, Ritual magick, Satanism, and Masonry.

The Pentagram has a long and complex history as a religious symbol. Found scrawled in caves of ancient Babylonia, the five pointed star was copied from the star shaped pattern formed by the travels of the planet Venus in the sky.

Today I found out the symbol on the “pound” or “number” key (#) is also called an “octothorpe”.. The origins of this term date back to the s and s in Bell Labs with the first documented place this word showed up being in a U.S.

patent filed by Bell Labs in Amount vs. Number: Usage Guide. Noun. Number is regularly used with count nouns a large number of mistakes any number of times while amount is mainly used with mass nouns.

annual amount of rainfall a substantial amount of money The use of amount with count nouns has been frequently criticized; it usually occurs when the number of things is thought of as a mass or collection glad to furnish any.

A number is a count or measurement that is really an idea in our minds. We write or talk about numbers using numerals such as "4" or "four". But we could also hold up 4 fingers, or tap the ground 4 times.

## Keep Exploring Britannica

These are all different ways of referring to the same number. A digit is a single symbol used. The Rational Numbers Next are the rational numbers. A rational number is any number that can be expressed as the quotient of two integers.

We can use any of these fraction notations to express rational numbers: a is called the numerator and b is called the denominator. The denominator cannot be zero.

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