Binary Numbers A binary number is a number expressed in the base-2 numeral system or binary numeral system, which uses only two symbols: typically "0" and "1". The base-2 numeral system is a positional notation with a radix of 2. Radix is basically another term for the base. The decimal digits are 0,1,2,3,4,5,6,7,8,9. Each digit is referred to as a bit. If the total binary digit is 1 then it is called bit. If the total binary digits are 4 then it is called nibble. If the total binary digits are 8 then it is called byte. Conversion of a decimal number into binary form : Let there be a number, say, 42. Now we know that binary digit places are the powers of 2 Now, 2 6 2 5 2 4 2 3 2 2 2 1 2 0 64 32 16 8 4 2 1 3. Now 42 < 64 so subtract 32 from 42 as 42 > 32. 4. 42 - 32 = 10.
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