diff --git a/strings/capitalize.py b/strings/capitalize.py
index e7e97c2be..c0b45e0d9 100644
--- a/strings/capitalize.py
+++ b/strings/capitalize.py
@@ -3,7 +3,8 @@ from string import ascii_lowercase, ascii_uppercase
 
 def capitalize(sentence: str) -> str:
     """
-    This function will capitalize the first letter of a sentence or a word
+    Capitalizes the first letter of a sentence or word.
+
     >>> capitalize("hello world")
     'Hello world'
     >>> capitalize("123 hello world")
@@ -17,6 +18,10 @@ def capitalize(sentence: str) -> str:
     """
     if not sentence:
         return ""
+
+    # Create a dictionary that maps lowercase letters to uppercase letters
+    # Capitalize the first character if it's a lowercase letter
+    # Concatenate the capitalized character with the rest of the string
     lower_to_upper = dict(zip(ascii_lowercase, ascii_uppercase))
     return lower_to_upper.get(sentence[0], sentence[0]) + sentence[1:]