Added week 9

week9/ex3.py

@@ -0,0 +1,27 @@
+try:
+    from decimal import Decimal
+except:
+    Decimal = float
+
+def calculation(a,b):
+    try:
+        a,b = Decimal(a),Decimal(b)
+    except:
+        raise ValueError("Given number is not even a decimal!")
+    
+    aa,s = a+b,a-b
+    print(f"{a}+{b}={aa},{a}-{b}={s}")
+    return aa,s
+    
+
+def main():
+    print('==Exercise 3==')
+    
+    a,s = calculation(114,514)
+    print(f"Return Value: {a},{s}")
+    
+    print('==End Of Ex3==')
+    return 0
+
+if __name__ == '__main__':
+    main()