add division func

calc.py

@@ -1,2 +1,92 @@
-print("world says hallo")
-print("hello to worlds")
+def main():
+    print("Welcome to the Calculator")
+    command = input("Select command: [ + ] [ - ] [ * ] [ / ] \nType exit if u want exit \n")
+    match command: #выбор команд
+        case "+":
+            summ()
+        case "*":
+            multiplication()
+        case "-":
+            minus()
+        case "/":
+            division()
+        case "exit":
+            exit
+        case _:
+            print(KeyError("Incorrect"))
+            main()
+def summ():
+    print("Enter number(s) to summ, enter spase to finish calculating")
+    try:
+        total = float(input("Enter First number \n"))
+    except ValueError:
+        print("Enter a valid number")
+        return
+    while True:
+        num_input = input("Enter numbers to summ\n")
+        if num_input == " " or num_input == "":
+            print(total)
+            main()
+        try:
+            number = float(num_input)
+            total -= number
+            print(f"Total summ = {total}")
+        except ValueError:
+            print("Error, enter correct number")
+def minus():
+    print("Enter number(s) to minus, enter spase to finish calculating")
+    try:
+        total = float(input("Enter First number \n"))
+    except ValueError:
+        print("Enter a valid number")
+        return
+    while True:
+        num_input = input("Enter numbers to minus\n")
+        if num_input == " " or num_input == "":
+            print(total)
+            main()
+        try:
+            number = float(num_input)
+            total -= number
+            print(f"Total minus = {total}")
+        except ValueError:
+            print("Error, enter correct number")
+def multiplication():
+    print("Enter number(s) to multuplicate, enter spase to finish calculating")
+    try:
+        total = float(input("Enter First number \n"))
+    except ValueError:
+        print("Enter a valid number")
+        return
+    while True:
+        num_input = input("Enter numbers to multiplicate\n")
+        if num_input == " " or num_input == "":
+            print(total)
+            main()
+        try:
+            number = float(num_input)
+            total *= number
+            print(f"Total multiplication = {total}")
+        except ValueError:
+            print("Error, enter correct number")
+def division():
+    print("Enter number(s) to division, enter spase to finish calculating")
+    try:
+        total = float(input("Enter First number \n"))
+    except ValueError:
+        print("Enter a valid number")
+        return
+    while True:
+        num_input = input("Enter numbers to division\n")
+        if num_input == " " or num_input == "":
+            print(total)
+            main()
+        try:
+            number = float(num_input)
+            total /= number
+            print(f"Total division = {total}")
+        except ValueError:
+            print("Error, enter correct number")
+
+if __name__ == "__main__":
+    main() #запуск функции main, основа программы