In a text paragraph I need to extract Number from it. How can I extract using string operations. Example.: A perfect and well-written paragraph comprises a key sentence, applicable supporting sentences 31/10/1997 creating a clear and concise photo.

@Minal Saini​ : if you source value which is constant every time and only the dates will change and you need to extract ? if yes then use string before and after and extract the value which is date

Here, extracting via string is not possible unless the position of the numbers stays same in all the paragraphs. If it is not same, then that presents a problem that can not be solved using any string operations!