ASCII Table

ASCII stands for American Standard Code for Information Interchange. ASCII codes represent text in computers, telecommunications equipment, and other devices.

ASCII (American Standard Code for Information Interchange) is a standard character encoding used in telecommunication. The ASCII pronounced ‘ask-ee’ , is strictly a seven bit code based on English alphabet.

ASCII codes are used to represent alphanumeric data . The code was first published as a standard in 1967. It was subsequently updated and published as  ANSI X3.4-1968, then as ANSI X3.4-1977 and finally as ANSI X3.4-1986.

Since it is a seven bit code , it can at the most represent 128 characters. It currently defines 95 printable characters including 26 upper case letters (A to Z) , 26 lower case letters , 10 numerals (0 to 9) and 33 special characters including mathematical symbols, punctuation marks and space character. They represent text in, telecommunications equipment, and devices.

These include numbers, upper and lowercase English letters, functions, punctuation symbols, and some other symbols. In total, there are 256 ASCII characters, and can be broadly divided into three categories: 

1. ASCII control characters (0-31 and 127)
2. ASCII printable characters (32-126) (most commonly referred)
3. Extended ASCII characters (128-255)

Dec  = Decimal Value
Char = Character

'5' has the int value 53
if we write '5'-'0' it evaluates to 53-48, or the int 5
if we write char c = 'B'+32; then c stores 'b'

We’ll use ASCII codes to translate data from one form to another. Below is the ASCII control character & ASCII printable character table (0 – 127):

Download the below chart –> ASCII Table

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