Add gcd_value

Author: DashaChizh

brain_games/games/gcd.py

@@ -7,18 +7,19 @@ def get_nums_and_answer():
     num_1 = get_random_num()
     num_2 = get_random_num()
     a, b = num_1, num_2
+    gcd_value = ''
 
-    if b == 0:
-        gcd = a
+    if b == 0 or a == b:
+        gcd_value = a
     else:
         remainder = a % b
         while remainder != 0:
             remainder = a % b
             a = b
             b = remainder
-            gcd = a
+            gcd_value = a
 
-    return f'{num_1} {num_2}', str(gcd)
+    return f'{num_1} {num_2}', str(gcd_value)
 
 
 def run_gcd_game():