regex match any single character one character only

Question

How do you match any one character with a regular expression   I am writing this question and the following answer for a general reference  A number of other questions on Stack Overflow sound like they promise a quick answer  but are actually asking something more specific    Regex   match only one occurrence of character regex to match a single character that is anything but a space Replace character in regex match only

User · Answer

Simple answer  If you want to match single character  put it inside those brackets      Examples   match              or   match a        a match  amp          amp       and so on  You can check your regular expresion online on this site  https   regex101 com    updated based on comment

User · Answer

Match any single character   Use the dot   character as a wildcard to match any single character    Example regex  a c  abc      match a c      match azc      match ac       no match abbc     no match   Match any specific character in a set   Use square brackets    to match any characters in a set  Use  w to match any single alphanumeric character  0-9  a-z  A-Z  and    underscore   Use  d to match any single digit  Use  s to match any single whitespace character    Example 1 regex  a bcd c  abc      match acc      match adc      match ac       no match abbc     no match   Example 2 regex  a 0-7 c  a0c      match a3c      match a7c      match a8c      no match ac       no match a55c     no match   Match any character except      Use the hat in square brackets     to match any single character except for any of the characters that come after the hat      Example regex  a  abc c  aac      no match abc      no match acc      no match a c      match azc      match ac       no match azzc     no match    Don t confuse the   here in     with its other usage as the start of line character      line start      line end     Match any character optionally  Use the optional character   after any character to specify zero or one occurrence of that character  Thus  you would use    to match any single character optionally   Example regex  a  c  abc      match a c      match azc      match ac       match abbc     no match   See also   A quick tutorial to teach you the basics of regex A practice sandbox to try things out

[regex] regex match any single character (one character only)

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