In this tutorial, I am sharing code to create a simple basic calculator to add, subtract, divide and multiply two numbers. In an earlier article, I have shared a Python complete basic tutorial for beginner. That article is featured with the simple command line code by which you can add, subtract, divide and multiply two numbers using commands. The intention of the tutorial is not only to make the Calculator but also to understand the how GUI objects are created in Python.
You can copy-paste and use it. Follow this article step by step, you can write your own code. Trust me you will learn something amazing. QtGui package. It provides inbuilt functionality to create GUI objects like text area, button, labels….
QtGui package installed on your system, you can download and install with this simple command. All the GUI objects will be configured inside the init function. It is the first function to be called. For example, if the user clicks on the multiplication button, it calls multiplication function. It reads the value from two text fields and performs the multiplication operation.
The value in input text field is in the text format and you need to convert it into an integer before performing arithmetic operations. Write a dedicated function for each of the arithmetic operation. These functions return the output to the caller. If you take the other programming languages, it is not so much easy to create GUI, but the Python does it with ease.
Now here it is you are looking for…. Now, this is all for you. Get your hands dirty with code and show your skill. Sir your tutorial is very explicit. Personally, I have not tried using any tool for GUI. It is an Open source GitHub project. You can try. Looks like you have installed PyQt5. The code in this tutorial is based on PyQt4. Either you can try installing PyQt4 or find suitable matching functions in PyQt5. I think you are using a Windows operating system.
Code for GUI Calculator in Python [Explained in Detail]
Looks like python3. Check if it is there. If it is there and you are using virtual environment, copy python3. Save my name, email, and website in this browser for the next time I comment. What do you want to Learn Today? Code Python.Get the latest tutorials on SysAdmin and open source topics.
Write for DigitalOcean You get paid, we donate to tech non-profits. DigitalOcean Meetups Find and meet other developers in your city. Become an author. 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.
For this tutorial, you should have Python 3 installed on your local computer and have a programming environment set up on the machine. If you need to either install Python or set up the environment, you can do so by following the appropriate guide for your operating system. Calculators work best when a human provides equations for the computer to solve. Inside of the parentheses of the input function we can pass a string to prompt the user.
After writing our two lines, we should save the program before we run it. We can call this program calculator. You should be able to type into the terminal window in response to each prompt. Depending on our needs of the calculator, we may want to convert the string that comes in from the input function to either an integer or a float. So far, we have set up two variables to store user input in the form of integer data types.
You can also experiment with converting the input to floats. We want the user to receive confirmation about the numbers they are entering and the operator that is being used alongside the produced result. At this point, you can add the rest of the operators to the program with the same format we have used for addition:.
If we run the program at this point, the program will execute all of the operations above. However, we want to limit the program to only perform one operation at a time. With our calculator. We could choose whatever symbols we want, though, like 1 for additionor b for subtraction. Because we are asking users for input, we want to use the input function.
Because of how we have structured our program, the if statement will be where the addition is performed, there will be 3 else-if or elif statements for each of the other operators, and the else statement will be put in place to handle an error if the person did not input an operator symbol.
To walk through this program, first it prompts the user to put in an operation symbol. Next, the program asks for 2 numbers, and the user inputs 58 and At this point, the program shows the equation performed and the product. You may want to consider other possible options for handling various situations. In this block of code, we want to give the user the choice as to whether they want to calculate again or not. Although there is some error-handling with the else statement above, we could probably do a little better to accept, say, a lower-case y and n in addition to the upper-case Y and N.
At this point, we should add the again function to the end of the calculate function so that we can trigger the code that asks the user whether or not they would like to continue.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. Here are some sample runs of the above python program to illustrates how to make a simple calculator. This is the initial output giving users, some number of choices 5 choices to choose any one from all these 5 choices. Now let's first try for the addition task by choosing or typing 1 as input and then enter any two number say 1 and 2 and then press enter key to check it out:.
Program to create grade calculator in Python
Now let's re-run the calculator program to this time check it out for subtraction of two numbers say 2 and 1 as shown in the following sample run:. Again re-run the same program, and this time, provide 4 as input to check for division task and supply two numbers, that is first number as 20 and second numbers as 3 then press enter key as shown here in the below sample run:.
Tools Calculator. Python Program to Make Calculator. 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. Addition" ; print "2. Subtraction" ; print "3. Multiplication" ; print "4. Division" ; print "5. All Rights Reserved.Write a program that accepts an exam score as input and prints out the corresponding grade.
We have not learned any kind of an "if" statement in my class yet.How to Create a Calculator in Python - Full Tutorial
I did a problem before this one that was similar:. Write a program that accepts a quiz score as an input and prints out the corresponding grade. I think I need to use a loop we know the for loop somehow or go back to the list. Also, I believe I would need to incorporate range. I am drawing a blank. How can I go about solving my problem without using any kind of if statements? I think you can use pretty much the same list that you used for the simpler problem.
All you need to come up with is a formula to calculate the index for each grade. I modified the program to test all possible values. It's still not elegant. I'm currently a student with him and we have the exact same problem hmwk 2 it's sooo hard and i was searching for some help as well I am doing my homework and am having trouble on a certain problem. For this, I just used a list.
Plenty of good solutions, pick one that fits your level. Edited 5 Years Ago by gui : short number of ask. Getting Started: Have something to contribute to this discussion? Please be thoughtful, detailed and courteous, and adhere to our posting rules. Edit Preview. H1 H2. Post Reply. Insert Code Block. Share Post.
It all works the way it should, but if someone more experienced could tell me a better way to work with the class names and the grade associated and if there is a more efficient way to calculate the grades with some kind of dictionary or some other way, that would be appreciated.
There's no good reason for the variables classes and grades to be defined and manipulated in global scope. For example, it would be better to pass grades into the calculate function as a parameter. The long if-else chain is tedious. You could instead use a dictionary to map the grade notes to scores:. This approach also makes it easy to use a list-comprehension that's more compact than a for loop:.
Making the user enter the class names seems rather pointless.
The program simply prints them back, without doing anything interesting with them. Python has a style guide called PEP8 with a utility to spot such issues. Well, calculating GPA of subjects is common in many programming language. Furthermore, this program is simple. In contrary, this is hard program in python. Being fearless, this is what we are going to learn. The program below takes n number of subjects. Then after, print average and class.
Sign up to join this community.Create a simple calculator which can perform basic arithmetic operations like addition, subtraction, multiplication or division depending upon the user input. Approach :. If you like GeeksforGeeks and would like to contribute, you can also write an article using contribute. See your article appearing on the GeeksforGeeks main page and help other Geeks. Please Improve this article if you find anything incorrect by clicking on the "Improve Article" button below.
Writing code in comment? Please use ide. Ways to increment a character in Python How to print without newline in Python? Decision Making in Python ifif. Approach : User choose the desired operation. Options 1, 2, 3 and 4 are valid.
Two numbers are taken and an if…elif…else branching is used to execute a particular section. Using functions addsubtractmultiply and divide evaluate respective operations. Example : Please select operation - 1. Add 2. Subtract 3. Multiply 4. Python program for simple calculator. Function to add two numbers.
Program to create grade calculator in Python
Python Code: Calculate the average score
Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. I'm working on a GPA calculator in python 2. However, I cannot get the code to work as I want. I was hoping if someone could me out and provide me some direction. Now, it only reads a letter or a symbol, but not both together.
If I put in multiple grades, it'll only read the first grade. The for part takes all the grades entered, and gives us the average GPA. Since this looks like homework, I'm not going to give a solution. But I will give a little bit more info about what is wrong. Hopefully if you understand what is wrong, you will be able to figure out how to do it right. As for why it's only giving you the result for the first grade, what does argv become? Is it all of the grades you send it? Learn more.
Asked 5 years, 2 months ago. Active 3 years, 1 month ago. Viewed 8k times. Balpreet Singh. Balpreet Singh Balpreet Singh 1 1 1 silver badge 2 2 bronze badges. How do you want it to work and how is it working now? What is your question? Active Oldest Votes. Joel Joel 14k 39 39 silver badges 67 67 bronze badges. Code-only answers are discouraged. It would be better to point out the lines to change, with explanation.
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