Calculator Program in Python | Simple GUI Calculator | Beginner's Python Project For Students

Here is the Complete Code For the Graphical Calculator in Python - Beginner's Python Project For Students. ( Download Link of Code Given at the End )

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INTRODUCTION :

A calculator is a machine that allows people to perform simple mathematic tasks. Some calculators are simple, and can only add, subtract, multiply and divide, sometimes taking square roots. 

Here is the simple calculator made by us in Python using Tkinter Library such that fully graphical beginner's Python Project for students. You can simply download the code from the link given at the end of this article and directly run it on your computer, no need to install various modules.

PYTHON CODE :

from tkinter import*

#---------Button Click------

def btnClick(numbers):

    global operator

    operator=operator+str(numbers)

    text_Input.set(operator)

    

#---------Clear Screen------    

def btnClearDisplay():

    global operator

    operator=""

    text_Input.set("0")

#---------Sum Up---------   

def btnEqualsInput():

    global operator

    sumup=str(eval(operator))

    text_Input.set(sumup)

    operator=""

#---------Main()---------

cal = Tk()

cal.title("Calculator")

operator=""

text_Input=StringVar()

#---------Display---------

txtDisplay = Entry(cal,font=('arial',20,'bold'), fg="white",textvariable=text_Input, bd=30, insertwidth=5, bg="black", justify='right').grid(columnspan=4)

#---------Clear Button---------

btnClear=Button(cal,padx=143.5,pady=8,bd=4, fg="lightgreen", font=('arial',16,'bold'),text="Clear",bg="black",command=btnClearDisplay).grid(row=1,column=0,columnspan=4)

#---------Button 1st Row---------

btn7=Button(cal,padx=23.5,pady=16,bd=4, fg="black", font=('arial',20,'bold'),text="7" ,command=lambda:btnClick(7),bg="white").grid(row=2,column=0)

btn8=Button(cal,padx=23.5,pady=16,bd=4, fg="black", font=('arial',20,'bold'),text="8",command=lambda:btnClick(8),bg="white").grid(row=2,column=1)

btn9=Button(cal,padx=23.5,pady=16,bd=4, fg="black", font=('arial',20,'bold'),text="9",command=lambda:btnClick(9),bg="white").grid(row=2,column=2)

Division=Button(cal,padx=24.5,pady=16,bd=4, fg="black", font=('arial',20,'bold'),text="/" ,command=lambda:btnClick("/"),bg="lightgrey").grid(row=2,column=3)

#---------Button 2nd Row---------

btn4=Button(cal,padx=23.5,pady=16,bd=4, fg="black", font=('arial',20,'bold'),text="4",command=lambda:btnClick(4),bg="white").grid(row=3,column=0)

btn5=Button(cal,padx=23.5,pady=16,bd=4, fg="black", font=('arial',20,'bold'),text="5",command=lambda:btnClick(5),bg="white").grid(row=3,column=1)

btn6=Button(cal,padx=23.5,pady=16,bd=4, fg="black", font=('arial',20,'bold'),text="6",command=lambda:btnClick(6),bg="white").grid(row=3,column=2)

Multiply=Button(cal,padx=23,pady=16,bd=4, fg="black", font=('arial',20,'bold'),text="*",command=lambda:btnClick("*"),bg="lightgrey").grid(row=3,column=3)

#---------Button 3rd Row---------

btn1=Button(cal,padx=23.5,pady=16,bd=4, fg="black", font=('arial',20,'bold'),text="1",command=lambda:btnClick(1),bg="white").grid(row=4,column=0)

btn2=Button(cal,padx=23.5,pady=16,bd=4, fg="black", font=('arial',20,'bold'),text="2",command=lambda:btnClick(2),bg="white").grid(row=4,column=1)

btn3=Button(cal,padx=23.5,pady=16,bd=4, fg="black", font=('arial',20,'bold'),text="3",command=lambda:btnClick(3),bg="white").grid(row=4,column=2)

Subtraction=Button(cal,padx=24,pady=16,bd=4, fg="black", font=('arial',20,'bold'),text="-",command=lambda:btnClick("-"),bg="lightgrey").grid(row=4,column=3)

#---------Button 4th Row---------

btn0=Button(cal,padx=23.5,pady=16,bd=4, fg="black", font=('arial',20,'bold'),text="0",command=lambda:btnClick(0),bg="white").grid(row=5,column=0)

DOT=Button(cal,padx=25.5,pady=16,bd=4, fg="black", font=('arial',20,'bold'),text=".",command=lambda:btnClick('.'),bg="white").grid(row=5,column=1)

btnEquals=Button(cal,padx=22.5,pady=16,bd=4, fg="black", font=('arial',20,'bold'),text="=",bg="orange",command=btnEqualsInput).grid(row=5,column=2)

Addition=Button(cal,padx=21,pady=16,bd=4, fg="black", font=('arial',20,'bold'),text="+",command=lambda:btnClick("+"),bg="lightgrey").grid(row=5,column=3)

#---------End of Program---------

cal.mainloop() 

#------MADE BY : CODING PLEX(https://coding-plex.blogspot.com) 

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