Question

What decimal number does the bit pattern 11001100 represent if it is a unsigned integer?

Answer 1

                                       11001100

                                          Most accurate representation = 0

                                                            Value is = -76

• Unsigned will hold a bigger positive worth, and no negative worth. Unsigned uses the leading bit as an area of the worth, whereas the signed version uses the left-most-bit to spot if the quantity is positive or negative. Signed integers will hold each positive and negative numbers
• A range number may be a number with no half part; it is often positive, negative or zero. In standard usage, one uses a sign to designate a negative number. However, a laptop will solely store info in bits, which may solely have the values zero or one. We’d expect, therefore, that the storage of negative integers during a laptop may need some special technique. It’s for that reason that we have a tendency to begin this section with a discussion of unsigned integers.
• As you may imagine, associate unsigned number is either positive or zero. Given our discussion within the previous sections regarding binary numbers, it would appear that there's very little additional to mention regarding unsigned integers.
• In fact, there's primarily just one issue, which is one among the foremost vital things that you simply can learn during this text. Take into account one digit decimal number: during a single digit, you'll write variety between zero and nine.
• In 2 decimal digits, you'll write variety between zero and ninety nine, and so on. Since 9 is corresponding to one zero one - one, ninety nine is corresponding to one02 - 1, etc., in n decimal digits, you'll write variety between zero and one0n - 1. Analogously, within the binary mathematical notation,
• It will be easier to check why you employ unsigned, once we tend to mentioned signed int, however one obvious reason to use unsigned int is once you need to declare variables which is able to ne'er be negative. For instance, a specific amount or the index of associate array.
• Even though these quantities area unit ne'er negative, typically you would like to possess negative numbers for error conditions.
• For instance, suppose you would like to write down a operate that determines wherever a precise character seems during a character array. It returns the index of that character.
• Suppose the character is not there. What price do you have to come? you cannot return -1 as a result of you cannot represent negative values for variables with kind, unsigned int.
• One risk is to come the array size, since the array size is larger than all valid indices of associate array. However, the matter therewith approach is that this range varies from array to array. -1 is good as a result of you'll use it in spite of the scale of associate array.
• An attainable resolution is to use a second variable that's set to zero if not found and one, if found.