Order of flow in my simple calculator in Python
Please help... it might be something quick and easy I hope. I'm 9 days in to Python. I have code for a simple calculator. I cant figure out how to stop the calculator from seeking the values to be calculated if the selection of operations from the choices 1-4 is invalid to start with. If someone selects > 4 (from options 1,2,3,4) it returns 'Invalid input' but then proceeds to ask for value to calculate. How can I stop this from happening? It should cease after 'Invalid input' and be run again.
Here is the code:
#Simple calculator # define my simple functions def add(x, y): return x + y def min(x, y): return x - y def mul(x, y): return x * y def div(x, y): return x / y # provide options for operations print("Please select an operation.") print("For addition select 1. ") print("For subtraction select 2.") print("For multiplication select 3.") print("For division select 4.") option = input("Please enter the number of your option 1, 2, 3, 4:") # limit option to 1,2,3,4 if option > '4': print("Invalid input. Please select 1,2,3 or 4.") elif option < '5': print("Please select an operation.") print("For addition select 1. ") print("For subtraction select 2.") print("For multiplication select 3.") print("For division select 4.") num1 = float(input( "Please enter the first value: ")) num2 = float(input( "Please enter the second value: ")) if choice == '1': print(num1, " + ", num2, "=", add(num1,num2)) elif choice == '2': print(num1, " - ", num2, "=", min(num1, num2)) elif choice == '3': print(num1, " * ", num2, "=", mul(num1,num2)) elif choice =='4': print(num1, " / ", num2, "=", div(num1, num2))
One option is the use the exit command:
So that the program stops and should be restarted manually.
Another option is to use a while loop like this:
while option not in [1,2,3,4]: option = input("Please enter the number of your option 1, 2, 3, 4:")
This forces the user to use a valid input.
How To Make a Simple Calculator Program in Python 3, To do this, we'll use Python's built-in input() function that accepts user-generated input from the keyboard. Inside of the parentheses of the input() Python Program to Make a Simple Calculator. In this example you will learn to create a simple calculator that can add, subtract, multiply or divide depending upon the input from the user. To understand this example, you should have the knowledge of following Python programming topics: Python Functions.
You can put the input part in a while loop:
option = input("Please enter the number of your option 1, 2, 3, 4:") while option > '4': print("Invalid input. Please select 1,2,3 or 4.") option = input("Please enter the number of your option 1, 2, 3, 4:")
Python Program to Make a Simple Calculator, In this example you will learn to create a simple calculator that can add, subtract, multiply or divide depending upon the input from the user. The Python programming language is a great tool to use when working with numbers and evaluating mathematical expressions. This quality can be utilized to make useful programs. This tutorial presents a learning exercise to help you make a simple command-line calculator program in Python 3. While we’ll go through one possibile way to make this
A basic calculator in Python, Welcome to Code Review :) Here are some nits and tips to get you on your way. It is much more Pythonic to define your functions outside the Pseudo Code for Python Calculator Prompt for first number Read first number and store in variable Display operations (1-add, 2-subtract, 3-multiply, 4-divide) Prompt for operation Read operation and store in variable Prompt for second number Read second number and store in variable If operation is equal to 1 (add) Then Add first number to second
1.13. Loops and Sequences, There are two Python statement types to do that: the simpler for loops, which In this simple sequential code, that also follows the textual order of the program. The line numbers are much more important here to keep track of the flow of If we call the number from the list num , the main calculation line in the loop could be. Basic calculator program using Python. Create a simple calculator which can perform basic arithmetic operations like addition, subtraction, multiplication or division depending upon the user input. Approach : User choose the desired operation. Options 1, 2, 3 and 4 are valid.
Pro Python System Administration, So a seemingly simple function becomes rather complicated; it has to check whether it can simple arithmetic constructs into more complicated if else logic flows. Going back to the division example, the whole calculation code can be I am fairly new to python. I have been asked to create a calculator using only string commands, conversions between int/string/float etc.(if needed), and using functions is a requirement. while and for loops can also be used. The program needs to take an input of the form x/y or x/y/z, where x y z are any positive or negative number.
Berry Phases in Electronic Structure Theory: Electric , The flow of the single-particle entanglement spectrum, as shown in Fig. the HWF flow approach has the advantage of requiring only a simple bulk calculation, #!/usr/bin/env python from __future__ import print_function # python3 style print Make Calculator in Python. To make simple calculator in python to perform basic mathematical operations such as add, subtract, multiply, and divide two numbers entered by the user. To make calculator in python, first provide 5 options to the user, the fifth option for exit. After providing all the five options to the user,
5. Functions, In the context of programming, a function is a named sequence of statements that the order in which statements are executed, which is called the flow of execution. That sounds simple enough, until you remember that one function can call Python | Simple GUI calculator using Tkinter. Prerequisite : Tkinter Introduction, lambda function. Python offers multiple options for developing GUI (Graphical User Interface). Out of all the GUI methods, tkinter is most commonly used method. It is a standard Python interface to the Tk GUI toolkit shipped with Python.