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Character code representation of decimal digit

Differentiate between the character code representation of a decimal digit and its pure binary representation

I study computer science and this is a concept I need to know for the exams but I am not sure I fully understand it

Character code representation of 261 (for example)

Would this just be the ASCII code equivalent?

Meaning:

2 has ASCII code 50

6 has ASCII code 54

1 has ASCII code 49

So the character code representation is 50, 54, 49

Pure Binary code representation

Is this just the binary conversion of 261?

So 100000101?

Solution

  • ASCII defines character digits 0 to 9 with the decimal number codes 48 to 57.

    So there is a representation in binary for the character but also for the the decimal digit.

    The binary representation of the character 46 is: 00110100 00110110. The character 4 is code 52 in ASCII; hence, you get 00110100. While character 6 is 54, for which you get 00110110.

    Meanwhile, the decimal number 46 is stored in a 16-bit word with the following representation: 00000000 00101110.

    For the character 261, you would need to get the ASCII code for 2, 6 and 1.

    2: 50

    6: 54

    1: 49

    So you get for 50, 54, 49 : 00110010 00110110 00110001