diff --git a/exec.c b/exec.c
index 98429e5..17944a1 100644
--- a/exec.c
+++ b/exec.c
@@ -14,10 +14,13 @@ int main() {
 
   // When the child process returns from `fork`, the value assigned to `pid`
   // will be 0. In the parent process, `pid` will be the process ID (a non-0
-  // number) of the child process.
+  // number) of the child process. It is important to note that the process ID
+  // of the child isn't actually 0. The call to `fork` only returns 0 to
+  // allow code to determine if it is the child. 
   if(pid == 0) {
-    // This call to `exec` will only be run by the child process. This is
-    // because `exec` replaces the process' instructions with the instructions
+    // Since this block only executes if `pid` is 0, the call to `execvp` will
+    // only be run by the child process. This is done because the `exec` family
+    // of functions replace the process' instructions with the instructions
     // found in `cmdline[0]` (in this case, `echo`). The `v` in `execvp` means
     // vector, which in this case refers to the array `cmdline`. The `p` means
     // path, indicating that it will search all of the directories found in the