chandeg minus func

calc.py

@@ -1,7 +1,7 @@
 def main():
     print("Welcome to the Calculator")
     command = input("Select command: [ + ] [ - ] [ * ] [ / ] \nType exit if u want exit \n")
-    match command:
+    match command: #выбор команд
         case "+":
             summ()
         case "*":
@@ -18,7 +18,7 @@ def summ():
     total = 0
     while True:
         num_input = input()
-        if num_input == " ":
+        if num_input == " " or num_input == "":
             print (f"Total summ = {total}")
             main()
         try: 
@@ -43,7 +43,7 @@ def minus():
             print("Error, enter correct number")
 def multiplication():
     print("Enter number to multiplication, enter space to calculate")
-    total = 0
+    total = 1
     while True:
         num_input = input()
         if num_input == " ":
@@ -55,5 +55,6 @@ def multiplication():
             print(f"Total multiplication = {total}")
         except ValueError:
             print("Error, enter correct number")
+
 if __name__ == "__main__":
-    main()
+    main() #запуск функции main, основа программы