title: String concatenation with a space
body: <p>In K&amp;R, I saw an example where a string can be concatenated with a space"</p>
  
  <pre><code>char *s = "abc" "foo";
  printf("%s", s); // prints "abcfoo"
  </code></pre>
  
  <p>How is space string concatenation different from using strcpy and strcat?</p>