How to use arrays in Solidity programming language ? 

How to use arrays i.e static array,dynamic array in Solidity programming language 

 pragma solidity ^0.5.0;

contract test {

   function testArray() public pure{

      uint len = 7; 

      

      //dynamic array

      uint[] memory a = new uint[](7);

      

      //bytes is same as byte[]

      bytes memory b = new bytes(len);

      

      assert(a.length == 7);

      assert(b.length == len);

      

      //access array variable

      a[6] = 8;

      

      //test array variable

      assert(a[6] == 8);

      

      //static array

      uint[3] memory c = [uint(1) , 2, 3];

      assert(c.length == 3);

   }

}