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main.py

@@ -0,0 +1,71 @@
+class Calculator:
+    def __init__(self):
+        self.question_number = 0
+        self.total = 0
+
+    def calculator(self):  # applies formula to the values
+        self.rate = self.rate / 100
+        self.monthly = self.monthly * 12
+        for i in range(0, self.years):
+            if self.total == 0:
+                self.total = self.account
+            self.total = (self.total + self.monthly) * (1 + self.rate)
+        print("Total amount of money you would have in your account after " + str(self.years) + " years: " + str(round(self.total, 2)))
+
+    def error(self):
+        if self.question_number == 1:
+            if self.account <= 0:
+                return True
+            else:
+                return False
+        if self.question_number == 2:
+            if self.monthly <= 0:
+                return True
+            else:
+                return False
+        else:
+            if 0 < self.rate < 100:
+                return False
+            else:
+                return True
+
+    def asker(self): # stores values from user inputs
+        if self.question_number == 0:
+            print("How many years will you be saving for? ")
+            self.years = int(input("Enter years: "))
+            self.question_number += 1
+
+        if self.question_number == 1:
+            print("How much money is currently in your account?")
+            self.account = float(input("Enter current amount in account: "))
+            if self.error():
+                self.asker()
+            else:
+                self.question_number += 1
+
+        if self.question_number == 2:
+            print("How much money are you planning on investing monthly? ")
+            self.monthly = float(input("Enter amount: "))
+            if self.error():
+                self.asker()
+            else:
+                self.question_number += 1
+
+        if self.question_number == 3:
+            print("What's the yearly interest rate of this investment?")
+            self.rate = int(input('Enter interest rate in percentage: '))
+            if self.error():
+                self.asker()
+            else:
+                self.question_number += 1
+
+        if self.question_number == 4:
+            self.calculator()
+
+
+c = Calculator()
+c.asker()
+
+
+
+