7
Seven
PrintableASCII 55 | Hex 0x37 | U+0037
Digit seven occupies ASCII 55. Standard ASCII uses 7 bits per character, giving exactly 128 possible values (0-127). This 7-bit width traces back to the constraint of existing telegraph equipment when the ASA committee designed the standard in the early 1960s. In Unix file permissions, 7 (binary 111) grants full read, write, and execute access. The common chmod 755 pattern gives the owner all permissions while restricting group and others to read and execute.
ASCII Code
Decimal
55
Hexadecimal
0x37
Octal
67
Binary
0011 0111
URL Escape
%37
Unicode
Code Point
U+0037
Escape
\u0037
UTF-8 Hex
0x37
UTF-8 Binary
00110111
UTF-16
0x0037
UTF-32
0x00000037
HTML Entities
Numeric
7
Hex
7
How to Type
Windows Alt CodeAlt + 55
HTML Entity
7
Unicode InputU+0037
Source Code Representations
C / Java
"\u0037"CSS
\0037JavaScript
"\u0037"Perl
\x{0037}Python 2
u"\u0037"Python 3
\u0037Ruby
\u{0037}Frequently Asked Questions
What is ASCII code 55?
ASCII code 55 represents the Seven character. In hexadecimal it is 0x37, in binary 0011 0111, and in octal 67. It is a printable character that appears as "7" in text.
How do I type ASCII 55 on a keyboard?
On Windows, hold Alt and type 55 on the numeric keypad. On Mac, you can use the Character Viewer (Edit > Emoji & Symbols). In HTML, use the entity 7 or 7.