Understanding The ASCII Table

Computers generally function by understating numbers and creating a standard to convert the numbers into characters. The ASCII standard assigns a distinct set digit to each character, whether an alphabet or a symbol. Utilizing ASCII for each character has simplified communication between computers and people.

The ASCII abbreviation stands for “American Standard Code for Information Exchange.” As the name implies, it is the code used to exchange information from machine to human or machine to machine.

What is ASCII?

Understanding The ASCII Table

To begin with, you need to be familiar with character encoding to understand ASCII. The process of assigning numbers or digits to characters is referred to as character encoding. These characters may be varied, including graphical characters and characters used in human languages. Computers use it to store data, transfer data, or manipulate data.

Encoding characters allows computers to read, understand, and work with the characters more effectively. Let’s make up some numbers and put them next to the appropriate letters for illustration’s sake. Let’s take the capital letters of all 26 alphabets and give each one a number from 1 to 26. We will have successfully encoded the characters and alphabet by giving them a numerical value. There are 26 different alphabets.

The numbers 12, 9, 14, 21, and 24 are assigned to the letters L, I, N, U and X, respectively. Computers will have an easier time deciphering and printing the characters now that this change has been made. On the other hand, in 1963, the American Standard Association published the initial version of ASCII to include all of the characters used in the English language. 

Why Is ASCII Important?

One of the essential things about ASCII is that it lets computers talk to each other and people in a standard way. By using the same characters and numbers, computers can read and understand text messages and other types of data, no matter what operating system, software, or hardware is being used. This makes it easier for different systems to share information and for digital devices to be used to talk to each other.

ASCII is also important when it comes to storing and sending data. Because it only uses a small number of letters and numbers, it is swift and easy to change to other character encodings when needed. This makes it possible to store and send large amounts of data quickly and accurately, which is essential for many applications in fields like finance, healthcare, and scientific research.

Overall, ASCII has been a vital part of the growth and development of digital technology. It will likely remain an essential tool for communication, data storage, and sharing information for many years.

ASCII Table – Character Code Chart with Decimal, Hex, Binary, HTML & Description

10100000001SOHStart of Header
20200000010STXStart of Text
30300000011ETXEnd of Text
40400000100EOTEnd of Transmission
90900001001	HTHorizontal Tab
LFLine Feed
110B00001011VTVertical Tab
120C00001100FFForm Feed
CRCarriage Return
140E00001110SOShift Out
150F00001111SIShift In
161000010000DLEData Link Escape
171100010001DC1Device Control 1
181200010010DC2Device Control 2
191300010011DC3Device Control 3
201400010100DC4Device Control 4
211500010101NAKNegative Acknowledge
231700010111ETBEnd of Transmission Block
251900011001EMEnd of Medium
281C00011100FSFile Separator
291D00011101GSGroup Separator
301E00011110RSRecord Separator
311F00011111USUnit Separator
322000100000 spaceSpace
332100100001!!Exclamation mark
342200100010"Double quote
362400100100$$Dollar sign
392700100111'Single quote
402800101000((Left parenthesis
412900101001))Right parenthesis
603C00111100<Less than
613D00111101==Equality sign
623E00111110>Greater than
633F00111111??Question mark
644001000000@@At sign
654101000001AACapital A
664201000010BBCapital B
674301000011CCCapital C
684401000100DDCapital D
694501000101EECapital E
704601000110FFCapital F
714701000111GGCapital G
724801001000HHCapital H
734901001001IICapital I
744A01001010JJCapital J
754B01001011KKCapital K
764C01001100LLCapital L
774D01001101MMCapital M
784E01001110NNCapital N
794F01001111OOCapital O
805001010000PPCapital P
815101010001QQCapital Q
825201010010RRCapital R
835301010011SSCapital S
845401010100TTCapital T
855501010101UUCapital U
865601010110VVCapital V
875701010111WWCapital W
885801011000XXCapital X
895901011001YYCapital Y
905A01011010ZZCapital Z
915B01011011[[Left square bracket
935D01011101]]Right square bracket
945E01011110^^Caret / circumflex
966001100000``Grave / accent
976101100001aaSmall a
986201100010bbSmall b
996301100011ccSmall c
1006401100100ddSmall d
1016501100101eeSmall e
1026601100110ffSmall f
1036701100111ggSmall g
1046801101000hhSmall h
1056901101001iiSmall i
1066A01101010jjSmall j
1076B01101011kkSmall k
1086C01101100llSmall l
1096D01101101mmSmall m
1106E01101110nnSmall n
1116F01101111ooSmall o
1127001110000ppSmall p
1137101110001qqSmall q
1147201110010rrSmall r
1157301110011ssSmall s
1167401110100ttSmall t
1177501110101uuSmall u
1187601110110vvSmall v
1197701110111wwSmall w
1207801111000xxSmall x
1217901111001yySmall y
1227A01111010zzSmall z
1237B01111011{{Left curly bracket
1247C01111100||Vertical bar
1257D01111101}}Right curly bracket

ASCII Advantages and Disadvantages

After more than 50 years of use, everyone knows the pros and cons of using ASCII character encoding. That is one of the best things about the way the encoding works.


Everyone agrees on it. Everyone knows how to use ASCII character encoding. Except for IBM mainframes, which use EBCDIC encoding, it is used everywhere in computing through the Unicode standard. Unicode character encoding has replaced ASCII character encoding, but it also works with ASCII.

Encoding characters in a small space. Seven bits can be used to make standard codes. This means that to store or send data that can be written in the standard ASCII character set, you only need as many bytes as there are characters in the data.

Effective for writing code. Character codes for letters and numbers work well with programming techniques for changing text and using numbers for calculations or storing as raw data.


Fewer characters to use. Even with extended ASCII, you can only show 255 different characters. A standard character set has enough characters for communicating in English. Despite the fact that expanded ASCII allows diacritical markings and Greek letters, working with languages that do not utilize the Latin alphabet is difficult.

Not a good way to encode characters. Standard ASCII encoding works well for both English text and numbers. You need extra things like escape codes to show characters from other alphabets.


Data can only be saved on computers in the form of numbers since computers only comprehend the language of numbers. So, for computers to comprehend the characters, each character must correspond to a specific numeric value. The alphabets make up the characters, and the many symbols available for usage in programming are a part of them.

This article will discuss the standard ASCII table to understand better how it can be understood and how it can be helpful for communication between various devices and computers. This article aims to give a better concept of how it can be understood and how it can be helpful.

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