![]() This regex matches any numeric substring (of digits 0 to 9) of the input.In fact, it could match zero or more substrings of the input (with global modifier). A regex may match a portion of the input (i.e., substring) or the entire input.In this case, + matches one or more digits. The +, known as occurrence indicator (or repetition operator), indicates one or more occurrences ( 1+) of the previous sub-expression.In this example, matches any SINGLE character between 0 and 9 (i.e., a digit), where dash ( -) denotes the range. It matches any SINGLE character in the list. The, known as character class (or bracket list), encloses a list of characters. ![]()
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