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adding a new python file not a game but a calculator

Author: jas023

calculator.py

@@ -0,0 +1,49 @@
+def add(x,y):
+    return x+y
+
+def sub(x,y):
+    return x-y
+
+def mul(x,y):
+    return x*y
+
+def divide(x,y):
+    if y == 0:
+        return "Error! Division by zero ia not possible."
+    return x/y
+
+print("Select operation: ")
+print("1. Addition")
+print("2. Subtraction")
+print("3. Multiplication")
+print("4. Division")
+
+while True:
+    choice = input("Enter choice of operation (1,2,3,4): ")
+    
+    if choice in ('1', '2', '3', '4'):
+        try:
+            num1 = input("Enter first number: ")
+            num2 = input("Enter second number: ")
+        except ValueError:
+            print("Invalid input, Please enter a number. ")
+            continue
+        
+        if choice == '1':
+            print(f"Result: {add(num1,num2)}")
+            
+        elif choice == '2':
+            print(f"Result: {sub(num1,num2)}")
+            
+        elif choice == '3':
+            print(f"Result: {mul(num1,num2)}")
+            
+        elif choice == '4':
+            print(f"Result: {divide(num1,num2)}")
+            
+        else:
+            print("Invalid choice.")        
+            
+    next_calc = input("Do you want another calculation? (yes/no): ")
+    if next_calc.lower() != 'yes':
+           break