fixed errors and added loop

Basic Calculator.py

@@ -5,51 +5,45 @@
 # New Delhi, India
 
 
-#Python program to create a simple calculator 
-  
-#Function to perform addition of two numbers
-def add(number1, number2): 
-    return (number1 + number2) 
-  
-#Function to perform subtraction of two numbers
-def subtract(number1, number2): 
+# Python program to create a simple calculator
+
+# Function to perform addition of two numbers
+def add(number1, number2):
+    return (number1 + number2)
+
+# Function to perform subtraction of two numbers
+def subtract(number1, number2):
     return (number1 - number2)
-  
-#Function to perform multiplication of two numbers 
-def multiply(number1, number2): 
-    return (number1 * number2) 
-  
-#Function to perform division of two numbers 
-def divide(number1, number2): 
+
+# Function to perform multiplication of two numbers
+def multiply(number1, number2):
+    return (number1 * number2)
+
+# Function to perform division of two numbers
+def divide(number1, number2):
     return (number1 / number2)
-
-print("Operation Menu -\n" \ 
-        "1. Addition of two numbers\n" \ 
-        "2. Subtraction of two numbers\n" \ 
-        "3. Multiplication of two numbers\n" \ 
-        "4. Division of two numbers\n") 
-
-
-#Taking input from the user  
-select = input("Select operations form 1, 2, 3, 4 :") 
-
-num1 = int(input("Enter first number: ")) 
-num2 = int(input("Enter second number: ")) 
-
-if select == '1': 
-    print(num1, "+", numb2, "=", 
-                    add(num1, num2)) 
-
-elif select == '2': 
-    print(num1, "-", num2, "=", 
-                    subtract(num1, num2)) 
-
-elif select == '3': 
-    print(num1, "*", num2, "=", 
-                    multiply(num1, num2)) 
-
-elif select == '4': 
-    print(num1, "/", num2, "=", 
-                    divide(num1, num2)) 
-else: 
-    print("Invalid input!"
+
+while True:                                         # created while loop to provide operation menu after each user input
+    print("Operation Menu -\n"
+          "1. Addition of two numbers\n"
+          "2. Subtraction of two numbers\n"
+          "3. Multiplication of two numbers\n"
+          "4. Division of two numbers\n")        # removed error: removed backslash at the end of each line since newline character already there
+
+    # Taking input from the user
+    select = input("Select operations form 1, 2, 3, 4 : ")
+
+    num1 = int(input("Enter first number: "))
+    num2 = int(input("Enter second number: "))
+
+    if select == '1':
+        print(num1, "+", num2, "=", add(num1, num2))   # removed error: incorrect variable name
+    elif select == '2':
+        print(num1, "-", num2, "=", subtract(num1, num2))
+    elif select == '3':
+        print(num1, "*", num2, "=", multiply(num1, num2))
+    elif select == '4':
+        print(num1, "/", num2, "=", divide(num1, num2))
+    else:
+        print("Invalid input! Please select from 1, 2, 3, or 4.")  # removed error: Added closing parentheses and more explanation for invalid input
+