Update README.md

Author: Jenni-Foued

0x08-recursion/README.md

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-# TBD
+# <div align="center">0x08. C - Recursion</div>
+
+## About
+
+   - What is recursion
+   - How to implement recursion
+   - In what situations you should implement recursion
+   - In what situations you shouldn’t implement recursion
+
+## Files & Descriptions
+
+[0-puts_recursion.c](https://github.com/Jenni-Foued/holbertonschool-low_level_programming/tree/master/0x08-recursion/0-puts_recursion.c)  a function that prints a string, followed by a new line
+
+[1-print_rev_recursion.c](https://github.com/Jenni-Foued/holbertonschool-low_level_programming/tree/master/0x08-recursion/1-print_rev_recursion.c)   a function that prints a string in reverse
+
+[2-strlen_recursion.c](https://github.com/Jenni-Foued/holbertonschool-low_level_programming/tree/master/0x08-recursion/2-strlen_recursion.c)  a function that returns the length of a string
+
+[3-factorial.c](https://github.com/Jenni-Foued/holbertonschool-low_level_programming/tree/master/0x08-recursion/3-factorial.c)  a function that returns the factorial of a given number
+
+[4-pow_recursion.c](https://github.com/Jenni-Foued/holbertonschool-low_level_programming/tree/master/0x08-recursion/4-pow_recursion.c)  a function that returns the value of x raised to the power of y
+
+[5-sqrt_recursion.c](https://github.com/Jenni-Foued/holbertonschool-low_level_programming/tree/master/0x08-recursion/5-sqrt_recursion.c)  a function that returns the natural square root of a number
+
+[6-is_prime_number.c](https://github.com/Jenni-Foued/holbertonschool-low_level_programming/tree/master/0x08-recursion/6-is_prime_number.c)  a function that returns 1 if the input integer is a prime number, otherwise return 0
+
+[7-is_palindrome.c](https://github.com/Jenni-Foued/holbertonschool-low_level_programming/tree/master/0x08-recursion/7-is_palindrome.c)  a function that returns 1 if a string is a palindrome and 0 if not
+
+[100-wildcmp.c](https://github.com/Jenni-Foued/holbertonschool-low_level_programming/tree/master/0x08-recursion/100-wildcmp.c)  a function that compares two strings and returns 1 if the strings can be considered identical, otherwise return 0