C++ pattern programs

C++ pattern programs 

1. Click here for pattern :-.........

     1

    222

   33333

 4444444

   33333

    222

      1

2. Click here for pattern:-..........

      *     

    ***    

   *****  

  ******* 
   *****
    ***
     *

3. Click here for pattern:-.........

     *     

    ***    

   *****  

  ******* 

Recursion: a function that calls itself.

Recursion in computer science is a method where the solution to a problem depends on solutions to smaller instances of the same problem. Most computer programming languages support recursion by allowing a function to call itself within the program text. Some functional programming languages do not define any looping constructs but rely solely on recursion to repeatedly call code.

USE: we can use recursion for iteration