Good code is its own best documentation. As you're about to add a comment, ask yourself, 'How can I improve the code so that this comment isn't needed?' Improve the code and then document it to make it even clearer. Steve McConnell
Write a program to implement Regular expression matching. If you give the string and expression, the program should match the regular expression.
Does the string contain space: true Number of space between the strings: 4 Hello How are you Replace space with tab in the string: Hello How are you