Introduction To Number System
A number system defines a set of values used to represent quantity. For example, the number of mobile phones kept in a shop, the number of persons standing in a queue, and the number of students attending a class.
There are many ways to represent the same numeric value. Long ago, humans used sticks to count; they then learned how to draw pictures of sticks on the ground and eventually on paper. So, the number 5 was first represented as: | | | | | (for five sticks). Later on, the Romans began using different symbols for multiple numbers of sticks: | | | still meant three sticks, but a V meant five sticks, and a X was used to represent ten of them. Using sticks to count was a great idea at that time. And using symbols instead of real sticks was much better. One of the best ways to represent a number today is by using the modern decimal system. Why? Because it includes the major breakthrough of using a symbol to represent the idea of counting nothing. About 1500 years ago, in India, zero (0) was first used as a number. It was later used in the Middle
East as the Arabic, sifr. It was finally introduced in the West as the Latin, zephiro. Soon it was seen how valuable the concept of zero was for all modern number systems.
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