Simple Calculator In Python

This is a simple calculator in Python, we have used the eval() method from Python to calculate all expressions. This method takes an expression in the form of a string and evaluates the expression. We have used try and except block to ensure that the program should not terminate in case of exceptions like an invalid expression as input by the user will result in an error but due to try and except block, we have shown using a message to enter a valid expression.

Code

print("Welcome to Simple calculator in Python")

while True:
    expression = input("Enter expression: ")
    try:
        print(eval(expression))
    except:
        print("Please enter correct expression")
        continue
    choice = input("Enter 'E' to exit program else any key to continue: ")
    if choice=='E':
        print("Exiting...")
        break
    continue

Output: