a
Lowercase a
PrintableASCII 97 | Hex 0x61 | U+0061
Lowercase a (ASCII 97) is the most frequently used letter in English text, appearing in roughly 8.2% of all characters. In hexadecimal notation, lowercase a represents the decimal value 10, and most style guides for hex (including CSS color codes) accept both uppercase A and lowercase a. The ASCII value 97 differs from uppercase A (65) by exactly 32, which corresponds to flipping bit 5. This regularity means case conversion in ASCII requires only a single bitwise operation.
ASCII Code
Decimal
97
Hexadecimal
0x61
Octal
141
Binary
0110 0001
URL Escape
%61
Unicode
Code Point
U+0061
Escape
\u0061
UTF-8 Hex
0x61
UTF-8 Binary
01100001
UTF-16
0x0061
UTF-32
0x00000061
HTML Entities
Numeric
a
Hex
a
How to Type
Windows Alt CodeAlt + 97
HTML Entity
a
Unicode InputU+0061
Source Code Representations
C / Java
"\u0061"CSS
\0061JavaScript
"\u0061"Perl
\x{0061}Python 2
u"\u0061"Python 3
\u0061Ruby
\u{0061}Frequently Asked Questions
What is ASCII code 97?
ASCII code 97 represents the Lowercase a character. In hexadecimal it is 0x61, in binary 0110 0001, and in octal 141. It is a printable character that appears as "a" in text.
How do I type ASCII 97 on a keyboard?
On Windows, hold Alt and type 97 on the numeric keypad. On Mac, you can use the Character Viewer (Edit > Emoji & Symbols). In HTML, use the entity a or a.