Code syntax highlighting

The default highlighter is arta as you see below: 

Let's say you want to use the Vs2015 theme, so you just do as below:

1. open an HTML snippet
2. write <link rel="stylesheet" href="css/h/vs2015.css"> inside it.

then everywhere in your post, the theme will be vs2015 like here:

#include<stdio.h>
int main(){
   int array[] = {1,2,3,4,5,6,7};
   int sum;
   sum = sum_array_elements(array,6);
   printf("\nSum of array elements is:%d",sum);
   return 0;
}
int sum_array_elements( int arr[], int n ) {
   if (n < 0) {
     //base case:
     return 0;
   } else{
     //Recursion: calling itself
     return arr[n] + sum_array_elements(arr, n-1);
    }
}

Don't specify the programming language!!

It will highlight the code automatically.

at first, you might not notice but if your code has lots of lines there will have a scroll problem.

List of all themes: (for preview see this)

• default.css
• a11-y-dark.css
• a11-y-light.css
  agate.css
  an-old-hope.css
• androidstudio.css
  arduino-light.css
• arta.css
  ascetic.css
  atelier-cave-dark.css
  atelier-cave-light.css
  atelier-dune-dark.css
  atelier-dune-light.css
  atelier-estuary-dark.css
  atelier-estuary-light.css
  atelier-forest-dark.css
  atelier-forest-light.css
  atelier-heath-dark.css
  atelier-heath-light.css
  atelier-lakeside-dark.css
  atelier-lakeside-light.css
  atelier-plateau-dark.css
  atelier-plateau-light.css
  atelier-savanna-dark.css
  atelier-savanna-light.css
  atelier-seaside-dark.css
  atelier-seaside-light.css
  atelier-sulphurpool-dark.css
  atelier-sulphurpool-light.css
  atom-one-dark-reasonable.css
  atom-one-dark.css
  atom-one-light.css
  brown-paper.css
  codepen-embed.css
  color-brewer.css
• darcula.css
  dark.css
  docco.css
  dracula.css
  far.css
  foundation.css
  github-gist.css
  github.css
  gml.css
  googlecode.css
  gradient-dark.css
  gradient-light.css
  grayscale.css
• gruvbox-dark.css
  gruvbox-light.css
  hopscotch.css
  hybrid.css
  idea.css
  ir-black.css
  isbl-editor-dark.css
  isbl-editor-light.css
  kimbie-dark.css
  kimbie-light.css
  lightfair.css
  lioshi.css
  magula.css
  mono-blue.css
  monokai-sublime.css
  monokai.css
  night-owl.css
  nnfx-dark.css
  nnfx.css
  nord.css
  obsidian.css
  ocean.css
  paraiso-dark.css
  paraiso-light.css
  pojoaque.css
  purebasic.css
  qtcreator-dark.css
  qtcreator-light.css
• railscasts.css
  rainbow.css
  routeros.css
  school-book.css
  shades-of-purple.css
  solarized-dark.css
  solarized-light.css
  srcery.css
• stackoverflow-dark.css
  stackoverflow-light.css
  sunburst.css
  tomorrow-night-blue.css
  tomorrow-night-bright.css
• tomorrow-night-eighties.css
• tomorrow-night.css
  tomorrow.css
  vs.css
• vs2015.css
  xcode.css
  xt256.css
  zenburn.css

for another example for gruvbox-dark, you should add this <link rel="stylesheet" href="css/h/gruvbox-dark.css"> don't forget css/h/ !!

Please don't add syntax highlighting code inside the summery section ( ゝ‿・)