Added comments

pendu.c

@@ -35,7 +35,12 @@ void display_hangman(int tries) {
     }
 }
 
-/*getWordByLength() function*/
+/*
+getWordByLength() function adds the possibility to the user to choose how many letters maximum the word to guess can contains.
+
+Returns:
+    A random word from the words list that correspond to the user input
+*/
 const char* getWordByLength(){
     int maxLetters;
     printf("Difficulté - Entrez le nombre de lettres maximum à deviner : ");