ASCII Table – Print ASCII Codes, Characters and Symbols by a Computer Program

ASCII stands for American Standard Code for Information Interchange. It is a character encoding standard that represents characters such as letters, numbers, and symbols as numbers between 0 and 127. ASCII codes are used to represent text in computers and other devices.

It is a 7-bit character code where each individual bit represents a unique character. So a maximum of 128 characters are represented in ASCII Standard which first 32 are control characters which were designed to control computer hardware. These are the standard characters used for most computer systems.

List of all ASCII Characters and Description
C Program to Print ASCII Characters
C++ Program to Print ASCII Characters
Python Program to Print ASCII Characters
C# Program to Print ASCII Characters
References

List of all ASCII Characters and Description

Decimal Number	OCT Number	HEX Number	BIN Number	Symbol	Description
0	000	00	0000000	NUL	Null character
1	001	01	0000001	SOH	Start of Heading
2	002	02	0000010	STX	Start of Text
3	003	03	0000011	ETX	End of Text
4	004	04	0000100	EOT	End of Transmission
5	005	05	0000101	ENQ	Enquiry
6	006	06	0000110	ACK	Acknowledge
7	007	07	0000111	BEL	Bell, Alert
8	010	08	0001000	BS	Backspace
9	011	09	0001001	HT	Horizontal Tab
10	012	0A	0000101	LF	Line Feed
11	013	0B	0001011	VT	Vertical Tabulation
12	014	0C	0001100	FF	Form Feed
13	015	0D	0001101	CR	Carriage Return
14	016	0E	0001110	SO	Shift Out
15	017	0F	0001111	SI	Shift In
16	020	10	0010000	DLE	Data Link Escape
17	021	11	0010001	DC1	Device Control One (XON)
18	022	12	0010010	DC2	Device Control Two
19	023	13	0010011	DC3	Device Control Three (XOFF)
20	024	14	0010100	DC4	Device Control Four
21	025	15	0010101	NAK	Negative Acknowledge
22	026	16	0010110	SYN	Synchronous Idle
23	027	17	0010111	ETB	End of Transmission Block
24	030	18	0011000	CAN	Cancel
25	031	19	0011001	EM	End of medium
26	032	1A	0011010	SUB	Substitute
27	033	1B	0011011	ESC	Escape
28	034	1C	0011100	FS	File Separator
29	035	1D	0011101	GS	Group Separator
30	036	1E	0011110	RS	Record Separator
31	037	1F	0011111	US	Unit Separator
32	040	20	0100000	SP	Space character
33	041	21	0100001	!	exclamation mark
34	042	22	0100010	“	quotation mark
35	043	23	0100011	#	number sign
36	044	24	0100100	$	dollar currency sign
37	045	25	0100101	%	percent sign
38	046	26	0100110	&	Ampersand (also used as and)
39	047	27	0100111	‘	Apostrophe (also known as single quote)
40	050	28	0101000	(	left parenthesis
41	051	29	0101001	)	right parenthesis
42	052	2A	0101010	*	asterisk
43	053	2B	0101011	+	plus sign
44	054	2C	0101100	,	comma
45	055	2D	0101101	–	hyphen
46	056	2E	0101110	.	period
47	057	2F	0101111	/	slash
48	060	30	0110000	0	number 0
49	061	31	0110001	1	number 1
50	062	32	0110010	2	number 2
51	063	33	0110011	3	number 3
52	064	34	0110100	4	number 4
53	065	35	0110101	5	number 5
54	066	36	0110110	6	number 6
55	067	37	0110111	7	number 7
56	070	38	0111000	8	number 8
57	071	39	0111001	9	number 9
58	072	3A	0111010	:	colon
59	073	3B	0111011	;	semicolon
60	074	3C	0111100	<	less-than
61	075	3D	0111101	=	equals-to
62	076	3E	0111110	>	greater-than
63	077	3F	0111111	?	question mark
64	100	40	1000000	@	at sign
65	101	41	1000001	A	uppercase letter A
66	102	42	1000010	B	uppercase letter B
67	103	43	1000011	C	uppercase letter C
68	104	44	1000100	D	uppercase letter D
69	105	45	1000101	E	uppercase letter E
70	106	46	1000110	F	uppercase letter F
71	107	47	1000111	G	uppercase letter G
72	110	48	1001000	H	uppercase letter H
73	111	49	1001001	I	uppercase letter I
74	112	4A	1001010	J	uppercase letter J
75	113	4B	1001011	K	uppercase letter K
76	114	4C	1001100	L	uppercase letter L
77	115	4D	1001101	M	uppercase letter M
78	116	4E	1001110	N	uppercase letter N
79	117	4F	1001111	O	uppercase letter O
80	120	50	1010000	P	uppercase letter P
81	121	51	1010001	Q	uppercase letter Q
82	122	52	1010010	R	uppercase letter R
83	123	53	1010011	S	uppercase letter S
84	124	54	1010100	T	uppercase letter T
85	125	55	1010101	U	uppercase letter U
86	126	56	1010110	V	uppercase letter V
87	127	57	1010111	W	uppercase letter W
88	130	58	1011000	X	uppercase letter X
89	131	59	1011001	Y	uppercase letter Y
90	132	5A	1011010	Z	uppercase letter Z
91	133	5B	1011011	[	left square bracket
92	134	5C	1011100	\	backslash
93	135	5D	1011101	]	right square bracket
94	136	5E	1011110	^	caret
95	137	5F	1011111	_	underscore
96	140	60	1100000	`	grave accent
97	141	61	1100001	a	lowercase letter a
98	142	62	1100010	b	lowercase letter b
99	143	63	1100011	c	lowercase letter c
100	144	64	1100100	d	lowercase letter d
101	145	65	1100101	e	lowercase letter e
102	146	66	1100110	f	lowercase letter f
103	147	67	1100111	g	lowercase letter g
104	150	68	1101000	h	lowercase letter h
105	151	69	1101001	i	lowercase letter i
106	152	6A	1101010	j	lowercase letter j
107	153	6B	1101011	k	lowercase letter k
108	154	6C	1101100	l	lowercase letter l
109	155	6D	1101101	m	lowercase letter m
110	156	6E	1101110	n	lowercase letter n
111	157	6F	1101111	o	lowercase letter o
112	160	70	1110000	p	lowercase letter p
113	161	71	1110001	q	lowercase letter q
114	162	72	1110010	r	lowercase letter r
115	163	73	1110011	s	lowercase letter s
116	164	74	1110100	t	lowercase letter t
117	165	75	1110101	u	lowercase letter u
118	166	76	1110110	v	lowercase letter v
119	167	77	1110111	w	lowercase letter w
120	170	78	1111000	x	lowercase letter x
121	171	79	1111001	y	lowercase letter y
122	172	7A	1111010	z	lowercase letter z
123	173	7B	1111011	{	left curly brace
124	174	7C	1111100	\|	vertical bar (also known as pipe sign)
125	175	7D	1111101	}	right curly brace
126	176	7E	1111110	~	Tilde sign
127	177	7F	1111111	DEL	Delete

C Program to Print ASCII Characters

This program prints the ASCII character table. The program displays each character’s Decimal, Octal, Hexadecimal, Binary, and Symbol representation. It uses a loop to iterate through all 128 ASCII values (0 to 127) and formats the output into neatly aligned columns. This is very handy C function for many programmers.

The program also, replaces non-printable ASCII characters (values 0–31 and 127) with a blank space (' ') to avoid displaying unprintable symbols.

#include <stdio.h>

void printBinary(int num, char *binStr) {
    for (int i = 7; i >= 0; i--) {
        binStr[7 - i] = (num & (1 << i)) ? '1' : '0';
    }
    binStr[8] = '\0'; // Null-terminate the string
}

int main() {
    printf("Decimal Number\tOCT Number\tHEX Number\tBIN Number\tSymbol\n");

    for (int i = 0; i < 128; i++) {
        char bin[9]; // Array to hold the binary string (8 bits + null terminator)
        printBinary(i, bin);

        // Replace non-printable characters with a blank space
        char symbol = (i >= 32 && i <= 126) ? i : ' ';

        printf("%d\t\t%03o\t\t%02X\t\t%s\t\t%c\n", i, i, i, bin, symbol);
    }

    return 0;
}

#include <stdio.h>

void printBinary(int num, char *binStr) {

for (int i = 7; i >= 0; i--) {

binStr[7 - i] = (num & (1 << i)) ? '1' : '0';

}

binStr[8] = '\0'; // Null-terminate the string

}

int main() {

printf("Decimal Number\tOCT Number\tHEX Number\tBIN Number\tSymbol\n");

for (int i = 0; i < 128; i++) {

char bin[9]; // Array to hold the binary string (8 bits + null terminator)

printBinary(i, bin);

// Replace non-printable characters with a blank space

char symbol = (i >= 32 && i <= 126) ? i : ' ';

printf("%d\t\t%03o\t\t%02X\t\t%s\t\t%c\n", i, i, i, bin, symbol);

}

return 0;

}

C++ Program to Print ASCII Characters

This C++ program generates and displays the ASCII character table in a structured format. It lists each ASCII character’s Decimal, Octal, Hexadecimal, Binary, and Symbol representations. The program is designed to iterate through all 128 ASCII values (from 0 to 127) and outputs the information in aligned columns for readability.

#include <iostream>
#include <iomanip>
#include <bitset>
using namespace std;

int main() {
    // Print the header
    cout << "Decimal Number\tOCT Number\tHEX Number\tBIN Number\tSymbol" << endl;

    for (int i = 0; i < 128; i++) {
        // Binary representation using std::bitset
        string binary = bitset<8>(i).to_string();

        // Replace non-printable characters with a space
        char symbol = (i >= 32 && i <= 126) ? static_cast<char>(i) : ' ';

        // Print the row
        cout << setw(15) << i                // Decimal number
             << setw(10) << oct << i         // Octal number
             << setw(10) << hex << uppercase << i  // Hexadecimal number
             << setw(15) << binary           // Binary number
             << setw(10) << symbol           // Symbol
             << endl;

        // Reset output stream formatting
        cout << dec; // Ensure decimal formatting is restored
    }

    return 0;
}

#include <iostream>

#include <iomanip>

#include <bitset>

using namespace std;

int main() {

// Print the header

cout << "Decimal Number\tOCT Number\tHEX Number\tBIN Number\tSymbol" << endl;

for (int i = 0; i < 128; i++) {

// Binary representation using std::bitset

string binary = bitset<8>(i).to_string();

// Replace non-printable characters with a space

char symbol = (i >= 32 && i <= 126) ? static_cast<char>(i) : ' ';

// Print the row

cout << setw(15) << i // Decimal number

<< setw(10) << oct << i // Octal number

<< setw(10) << hex << uppercase << i // Hexadecimal number

<< setw(15) << binary // Binary number

<< setw(10) << symbol // Symbol

<< endl;

// Reset output stream formatting

cout << dec; // Ensure decimal formatting is restored

}

return 0;

}

Python Program to Print ASCII Characters

The program uses Python’s format function to convert each ASCII value into an 8-bit binary representation.

# Function to generate an 8-bit binary representation
def to_binary(num):
    return format(num, '08b')

# Print the header
print(f"{'Decimal Number':<15}{'OCT Number':<12}{'HEX Number':<12}{'BIN Number':<12}{'Symbol':<10}")

# Iterate through all 128 ASCII characters
for i in range(128):
    decimal = i  # Decimal representation
    octal = format(i, '03o')  # Octal representation
    hexadecimal = format(i, '02X')  # Hexadecimal representation in uppercase
    binary = to_binary(i)  # Binary representation
    symbol = chr(i) if 32 <= i <= 126 else ' '  # Display symbol or blank for non-printable characters
    
    # Print the row
    print(f"{decimal:<15}{octal:<12}{hexadecimal:<12}{binary:<12}{symbol:<10}")

# Function to generate an 8-bit binary representation

def to_binary(num):

return format(num, '08b')

# Print the header

print(f"{'Decimal Number':<15}{'OCT Number':<12}{'HEX Number':<12}{'BIN Number':<12}{'Symbol':<10}")

# Iterate through all 128 ASCII characters

for i in range(128):

decimal = i # Decimal representation

octal = format(i, '03o') # Octal representation

hexadecimal = format(i, '02X') # Hexadecimal representation in uppercase

binary = to_binary(i) # Binary representation

symbol = chr(i) if 32 <= i <= 126 else ' ' # Display symbol or blank for non-printable characters

# Print the row

print(f"{decimal:<15}{octal:<12}{hexadecimal:<12}{binary:<12}{symbol:<10}")

C# Program to Print ASCII Characters

using System;

class AsciiTable
{
    // Method to convert an integer to 8-bit binary string
    public static string ToBinary(int num)
    {
        return Convert.ToString(num, 2).PadLeft(8, '0');
    }

    public static void Main()
    {
        // Print the header
        Console.WriteLine("{0,-15}{1,-12}{2,-12}{3,-12}{4,-10}", 
                          "Decimal Number", "OCT Number", "HEX Number", "BIN Number", "Symbol");

        // Iterate through all 128 ASCII characters
        for (int i = 0; i < 128; i++)
        {
            int decimalValue = i;  // Decimal representation
            string octal = Convert.ToString(i, 8);  // Octal representation
            string hexadecimal = Convert.ToString(i, 16).ToUpper();  // Hexadecimal representation in uppercase
            string binary = ToBinary(i);  // Binary representation
            // Display symbol or blank for non-printable characters
            string symbol = (i >= 32 && i <= 126) ? ((char)i).ToString() : " ";  

            // Print the row with proper formatting
            Console.WriteLine("{0,-15}{1,-12}{2,-12}{3,-12}{4,-10}", 
                              decimalValue, octal, hexadecimal, binary, symbol);
        }
    }
}

using System;

class AsciiTable

{

// Method to convert an integer to 8-bit binary string

public static string ToBinary(int num)

{

return Convert.ToString(num, 2).PadLeft(8, '0');

}

public static void Main()

{

// Print the header

Console.WriteLine("{0,-15}{1,-12}{2,-12}{3,-12}{4,-10}",

"Decimal Number", "OCT Number", "HEX Number", "BIN Number", "Symbol");

// Iterate through all 128 ASCII characters

for (int i = 0; i < 128; i++)

{

int decimalValue = i; // Decimal representation

string octal = Convert.ToString(i, 8); // Octal representation

string hexadecimal = Convert.ToString(i, 16).ToUpper(); // Hexadecimal representation in uppercase

string binary = ToBinary(i); // Binary representation

// Display symbol or blank for non-printable characters

string symbol = (i >= 32 && i <= 126) ? ((char)i).ToString() : " ";

// Print the row with proper formatting

Console.WriteLine("{0,-15}{1,-12}{2,-12}{3,-12}{4,-10}",

decimalValue, octal, hexadecimal, binary, symbol);

}

Output of the Programs:

ASCII Table – Print ASCII Codes, Characters and Symbols by a Computer Program

List of all ASCII Characters and Description

C Program to Print ASCII Characters

C++ Program to Print ASCII Characters

Python Program to Print ASCII Characters

C# Program to Print ASCII Characters

References

About The Author

M. Saqib

ASCII Table – Print ASCII Codes, Characters and Symbols by a Computer Program

List of all ASCII Characters and Description

C Program to Print ASCII Characters

C++ Program to Print ASCII Characters

Python Program to Print ASCII Characters

C# Program to Print ASCII Characters

References

About The Author

M. Saqib

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