In a positional number framework, every image addresses different worth relying upon the position they involve in a number, and every framework has a worth that connects with the number straightforwardly close to it. The all out worth of a positional number is the absolute of the resultant worth, everything being equal. The decimal number framework is known as a positional number framework on the grounds that the worth of the number relies upon the place of the digits. For instance, the number 12345 has an altogether different worth than the number 54321, albeit similar digits are utilized in the two numbers. The situation where the digit seems influences the worth of that digit.

In a positional number framework, the worth of not entirely set in stone by which place it shows up in the full number. The most reduced spot esteem is the furthest right position, and each progressive situation to the left has a higher spot esteem. Thus, the furthest right position addresses the “ones” segment, the following position addresses the “tens” segment, the following position addresses “hundreds” and the following position addresses the “thousand” and afterward 10,000 and so forth Thusly, the number 54321 addresses 5x 10,000, 4x 1,000 3x hundred, 2 tens and 1 x one, though the number 12345 addresses 1x 10,000 2 x 1,000 3 hundred, 4 x tens and 5 ones. The twofold, octal and hexadecimal all are the instances of a Positional Number System.

Decimal Positional Notation

The decimal positional documentation framework fill in as portrayed in the table in the figure beneath. To utilize the positional number framework, match a given number to its positional worth. The bolt at the left side shows that the table can be extended by the position and can ascertain.


Term Radix is utilized to depict the quantity of digits used in positional number framework or its recognizes the positional number framework base. The decimal documentation framework in light of 10, hence the radix is 10.

Position in

It shows the place of the decimal number. The position is beginning from right to left. So 0 is the first position 1 is the second position, 2 is the third position, etc. The numbers additionally address the outstanding worth that will be utilized to compute the positional worth of the fourth line.


The third column works out the positional worth by taking the radix and raising it by the remarkable worth of its position. Significant is that n0 is consistently = 1.

Position Value

The primary column shows the number base or radix. So the worth recorded, from left to right, addresses units of thousands, hundreds, tens, and ones.

Model – 12345 and 54321

Paired Positional Notation

The paired positional documentation works likewise like the decimal number framework as displayed in the figure beneath. It has likewise a Radix, Position, which is from right to left; Calculation and positional worth as depict for decimal. The Radix for Binary is 2. The model is likewise displayed beneath

Changing over Between Decimal and Binary

Change of twofold to a decimal number (base-2 to base-10) numbers and back is a significant idea to comprehend the double numbering framework. Double number framework shapes the reason for all PCs, computerized frameworks, programming dialects and furthermore critical to comprehend IP address and IP address subnetting.

Twofold to Decimal Conversion

For understanding IP tending to and subnetting, the organization specialist should see how to change over from twofold to decimal and back. There are multiple ways of changing over from paired to decimal. Here we will comprehend change from parallel to decimal and afterward from decimal to double.

Paired to Decimal Using Positional Notation

Positional documentation is one of the most involved techniques for change among twofold and decimal. Thus, to change this number over to decimal base 10 framework utilizing the positional framework documentation.

The figure beneath represents the change of the twofold to decimal, record the positional worth from right to left and directly down the parallel number in the following line underneath the positional qualities. Then, increase the double numbers in the second line with its relating positional worth in the principal column and add them up to get the decimal number which is 199.

The positional worth is going twofold from right to left. For instance from right to left first positional worth is 1, the following position esteem is 2, which is twofold of 1 (the worth of the main position), the third spot esteem is 4 which is likewise twofold of the second position esteem. We can compose positional worth by this strategy as per the digits of double.

The following twofold worth is 10111100 So, compose the positional worth as indicated by the quantity of the digits in the parallel worth. And afterward compose the twofold numbers beneath the positional qualities and guide them up. Presently If the digit is a 1, compose its relating positional worth beneath the line, under the digit. Assuming the digit is a 0, compose a 0 beneath the line, under the digit and, include the numbers composed underneath the line. This is what might be compared to the double number. See figure the figure underneath.

Presently we comprehend the essential transformation from parallel to decimal, so we can attempt to change over a twofold IPv4 address to its spotted decimal equivalent. To start with, partition 32 pieces of the IPv4 address into four 8-digit octets. Then, at that point, ascertain the double positional worth to the main octet twofold number and compute all others so.

For instance, consider that 11110110.10111111.11101011.11011011 is the twofold IPv4 address. You really want to change the parallel location over to decimal, basically start from the main octet as displayed in Figure beneath. Enter the 8-bit twofold number under the positional worth of line 1 and afterward compute to create the decimal number for the primary octet of the dabbed decimal documentation. Then, convert the leftover octets. Also record the full IP address in dabbed decimal documentation.

Decimal to Binary Conversion

Decimal to paired change is additionally critical to comprehend, we can need to change over a specked decimal IPv4 address to twofold. For changing over from decimal to double, we can likewise utilize positional worth table. The figure underneath outlines the decimal to the parallel transformation process. For instance, we need to change over figure 246 into twofold. The means for changing over from decimal to double are the accompanying:


Record the positional worth from left to compose as displayed in the figure underneath. In the event that the decimal number (242 for our situation) is equivalent to or more prominent than the main piece (128). On the off chance that indeed, add a twofold 1 beneath the 128 positional worth and deduct 128 from the decimal number (242 – 128 =114 for our situation). In the event that no, enter twofold 0 beneath the 128 positional worth.


Think about if the rest of is equivalent to or more noteworthy than the following most-critical piece (64). In the event that indeed, add a twofold 1 underneath the 64 positional worth and take away the positional worth 64 from the decimal number (114 – 64 =50 for our situation). On the off chance that no, enter double 0 underneath the 64 positional worth.


Think about if the rest of is equivalent to or more prominent than the following most-critical piece (32). If indeed, add a double 1 beneath the 32 positional worth and deduct positional worth 32 from the decimal number (50 – 32 =18 for our situation). In the event that no, enter parallel 0 beneath the 64 positional worth.


Think about if the rest of is equivalent to or more prominent than the following most-critical piece (16). On the off chance that indeed, add a parallel 1 beneath the 16 positional worth and take away positional worth 16 from the decimal number (18 – 16 =2 for our situation). On the off chance that no, enter double 0 underneath the 16 positional worth.


Analyze if the update (2) with the following – most critical piece, you can see that the rest of not exactly the huge worth (80), thus, add a paired 0 in the 8 positional worth, and step forward to next positional worth which is (4), the update is likewise not exactly this positional worth, along these lines, add 0 underneath this position worth and step forward to next esteem. The following worth is positional worth is (2), So, Subtract the update 2 from the positional worth (2-2=0), set the 0 in the last position.