Added documentation comments

brain-jogging.py

@@ -7,10 +7,33 @@ from reportlab.pdfbase import pdfmetrics
 from reportlab.pdfbase.ttfonts import TTFont
 
 def format_and_return(a, b, operation, result):
+    """
+    Formats and returns a math problem string along with its result.
+    
+    Args:
+        a (int): The first operand in the math problem.
+        b (int): The second operand in the math problem.
+        operation (str): The mathematical operation ('+', '-', '*', '/') to be performed.
+        result (int): The result of the math problem.
+        
+    Returns:
+        tuple: A tuple containing the formatted math problem string and its result.
+    """
     a_str, b_str = str(a).rjust(2, ' '), str(b).rjust(2, ' ')
     return f"{a_str} {operation} {b_str} =", result
 
 def generate_math_problem():
+    """
+    Generates a random math problem with an operation chosen from addition, subtraction, multiplication, or division.
+    
+    The operands are randomly generated integers, with the following constraints:
+        - Both operands are within the range [0, 20] for addition and subtraction.
+        - Both operands are within the range [0, 20] for multiplication.
+        - For division, the divisor is within the range [1, 5] and the dividend is a multiple of the divisor, within the range [1, 40].
+
+    Returns:
+        tuple: A tuple containing the formatted math problem string and the correct result (integer).
+    """
     operation = random.choice(['+', '-', '*', '/'])
     a, b = random.randint(0, 20), random.randint(0, 20)