Signed number

Signed number definition

With a sign, if we present a binary number then it is known as a Signed number. Understanding a binary number is negative or positive it is essential. 

In the decimal number system, we use the "+ "sign for representing a positive number and the "-" sign for representing a negative number.

But in the binary number system, an extra bit is used for representing any number which is positive or negative.

This extra bit is called a sign bit. Here are examples of a Signed number.
If the number is negative the sign bit is 1 and if the number is positive then the sign bit is positive.

Signed number example

With a sign, if we present a binary number then it is known as a Signed number. Understanding a binary number is negative or positive it is essential. 

     0 1 0 0 0 1 1 1 
     ↑

It is a positive number because the sign bit is 0

     1 1 0 1 1 0 0 1
     ↑

 It is a negative number because the sign bit is 1   

Now read about the compliment and its types.