title: How to declare and store value in 2D array?
body: <p>I tried to print every pair of element while it's factorial
  language: language-c</p>
  <pre><code>#include&lt;studio library&gt;//
  
  in main function I try to store 2D array which size is
  a[1][3];
  
  And, I write these code
  
  integer a[1][3] = {1,2,3,4,5};
  and I find factorial of 5 = 120
  I have to print three element together
  it is possible 120 times;
  
  so ,I can try 120 different value using print function function
  in a[1][3];
  
  
  
  like this output
  1,2,3     is 1.
  1,2,4     is 2.
  1,2,5     is 3.
  1,3,4     is 4.
  1,3,5 up to 120
  </code></pre>
  <p>I want to know that how to store value in 2D array
  but the array is a[1][3]</p>