Regex Symbols Explanation

• ^ and $:

  • Start (^) and end ($) of the string, respectively.

• []:

  • Character set, defining the allowed characters inside the brackets.

• [^]:

  • Negated character set, defining the characters that are not allowed.

• \s:

  • Matches whitespace characters (spaces, tabs, newlines, etc.).

• .:

  • Matches any character (except newlines).

• \.:

  • Escaped dot, matches a literal period (.).

• \d:

  • Matches any digit (0-9).

• +:

  • Matches one or more of the preceding element.

• *:

  • Matches zero or more of the preceding element.

• (?=...):

  • Lookahead assertion, ensures the presence of a pattern without consuming it in the string.

• {min,max}:

  • Specifies the minimum and maximum length for the preceding element.