How To Restart A Program At A Certain Point In Python

So I made a very primitive and probably inefficient calculator today (first time using Python), and I want to be able to continue doing more problems, how would I do so? Here is my

Solution 1:

The best way of doing this is probably with a while loop.

whileTrue:
    ## your codeif cont != "yes":
        break## quit

Solution 2:

Using a while loop, which keeps executing the block as long as the condition, cont == "yes", is true, i.e. it stops when the condition becomes false. After the while loop stops, the code after it is executed, in this case print("Bye, thanks for using the calculator.").

PS: The brackets around a and b in print ((a) + (b)) are unnecessary. Similarly, the brackets around opera and cont are also unnecessary. Also, the space after print makes it a little hard to see which function the arguments are part of. I'd suggest you remove the space. Otherwise for a beginner-level programmer the code is good. Once you become more experienced with Python, you might want to use a dictionary mapping the names of the operator into the functions in the operator module.

import time
print ("Welcome. This is a calculator that uses the function: A (operator) B.")
time.sleep(3.5)
print ("Available operators include: Addition, Subtraction, Multiplication, Division,        Exponent, and Remainder division.")
time.sleep(3.5)
cont = "yes"# So that the first time the while loop block will runwhile cont == "yes":
    a = float(input("Type in a value of A. "))
    b = float(input("Type in a value of B. "))
    operb = input("Would you like to: Add - Subtract - Multiply - Divide - Exponent - or Remainder? ")
    opera = operb.lower()
    if (opera) == "add":
        print ((a) + (b))
    elif (opera) == "subtract":
        print ((a) - (b))
    elif (opera) == "multiply":
        print ((a) * (b))
    elif (opera) == "divide":
        print ((a) / (b))
    elif (opera) == "exponent":
        print ((a) ** (b))
    elif (opera) == "remainder":
        print ((a) % (b))
    else:
        print ("Invalid operation.")
    cont = input("Would you like to do another problem?")
    cont = cont.lower()

print("Bye, thanks for using the calculator.")

Solution 3:

You most likely going to want to use a while loop, something like:

import time
print ("Welcome. This is a calculator that uses the function: A (operator) B.")
time.sleep(3.5)
print ("Available operators include: Addition, Subtraction, Multiplication, Division,        Exponent, and Remainder division.")
time.sleep(3.5)
whileTrue:
    a = float(input("Type in a value of A. "))
    if a == 'q':  # set up a condition to end the programreturn