added validation to user inputs

Author: 0silverback0

projects/Loan Calculator/main.py

@@ -19,11 +19,9 @@ def main():
     print("Welcome to the Loan Calculator!")
 
     # Get user input
-    principal = float(input("Enter the loan amount: $"))
-    annual_interest_rate = float(
-        input("Enter the annual interest rate (as a percentage): ")
-    )
-    months = int(input("Enter the loan term (in months): "))
+    principal = floatValidation("Enter the loan amount: $")
+    annual_interest_rate = floatValidation("Enter the annual interest rate (as a percentage): ")
+    months = intValidtaion("Enter the loan term (in months): ")
 
     # Calculate monthly payment
     monthly_payment = calculate_loan_payment(principal, annual_interest_rate, months)
@@ -32,5 +30,22 @@ def main():
     print(f"Your monthly payment will be: ${monthly_payment:.2f}")
 
 
+def floatValidation(question):
+    while True:
+        try:
+            value = float(input(question))
+            return value
+        except ValueError:
+            print('Input should be a valid number')
+            continue
+
+def intValidtaion(question):
+    while True:
+        try:
+            value = int(input(question))
+            return value
+        except ValueError:
+            print('Input should be a valid number')
+
 if __name__ == "__main__":
     main()