//

The two slashes // may indicate:

• a comment marker in several programming languages including C, C++, JavaScript and Java
• the root directory path in Domain/OS
• the operator for integer division, in Python 2.2+ and other programming languages
• the empty pattern in Perl, which evaluates the last successfully matched regular expression
• the logical defined-or operator in Perl, called the null coalescing operator in other programming languages
• the authority indicator in the URI scheme, which follows a colon (://) from the scheme component
• the descendant-or-self axis specifier in XPath
• a double vertical bar (||) where the vertical line character | is unavailable for technical reasons
• the parallel operator stylized in pseudo-italics
• a caesura in musical notation
• a diaphoneme in linguistic transcription

See also

• Slash (punctuation)
• Backslash
• /\ (disambiguation)
• /r/ (disambiguation)
• \/ (disambiguation)
• \\ (disambiguation)
• ǁ (Khoekhoe letter)
• Combining Diacritical Marks for Symbols