Step by Step solution about How to resolve the algorithm Regular expressions step by step in the Mathematica/Wolfram Language programming language

Wolfram Language has a powerful set of built-in functions for manipulating strings. Two of the most useful are StringCases and StringReplace.

StringCases finds all matches of a regular expression in a string and returns a list of the matches. In the first example, the regular expression [0-9]+ matches any sequence of one or more digits. The StringCases function is then used to find all matches of this regular expression in the string "I am a string with the number 18374 in me". The result is a list containing the single match "18374".

StringReplace replaces all matches of a regular expression in a string with a replacement string. In the second example, the regular expression I\\sam matches the string "I am". The replacement string "I'm" is then used to replace all matches of this regular expression in the string "I am a string". The result is the string "I'm a string".

These are just two examples of the many ways that strings can be manipulated in Wolfram Language. For more information, see the Wolfram Language documentation on strings.

StringCases["I am a string with the number 18374 in me",RegularExpression["[0-9]+"]]
StringReplace["I am a string",RegularExpression["I\\sam"] -> "I'm"]