C

#include <stdio.h>

int main(void)
{
    printf("hello, world\n");
}

JavaScript

document.addEventListener("DOMContentLoaded", (event) => {
  document.querySelectorAll("pre[class*=language-]").forEach((element) => {
    element.classList.add("match-braces");
    element.classList.add("rainbow-braces");
  });
  document.querySelectorAll("code[class*=language-]").forEach((element) => {
    element.classList.add("diff-highlight");
  });
  Prism.highlightAll();
});

Lisp

(defun factorial (n)
    (if (= n 0) 1
        (* n (factorial (- n 1)))))