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they use numbers not words.
Computers use a binary system, not decimal.
BINARY
Ever wonder what the real numbers are? Numbers are artificial things invented by human, and the same applied to computers. So, the inventors of computers storing human readable numbers (decimal, Roman numerals, etc...) as computer readable numbers (binary). Binary fit very well with the electrical pulses (on and off, as 1 and 0)
Computers use the binary system because, electrically, it is the simplest system to use. With the binary system, there are only two types of electrical states: on and off. With other systems, there would have to be different voltages that signify different numbers.
Binary can only be 1 & 0. Decimal numbers have a dot in them. Binary numbers use only 2 symbols (0 and 1) to represent different numbers, while decimal numbers use 10 symbols (0 to 9) to represent different numbers. check the below link for more.
Computers and calculators utilize the base 2 because it is easier to program binary numbers (base 2) into the computer than decimal numbers (base 10).
No, they use the binary system
Prime numbers are prime numbers - whether we count in the decimal, binary, hexadecimal or another base.
Decimal numbers are real numbers. In C and C++ we use the float, double and long double data types to represent real numbers.
yes it does
Robots are controlled by computers. They can certainly process numbers and make calculations. As for understanding, that depends on what you mean by understand. Robots with speech recognition systems can understand spoken numbers subject to the limits of the system. Robots use artificial intelligence techniques to "think". Nobody knows for sure what the limits of AI may be.