This JavaScript program implements a basic calculator interface within an HTML form. It allows users to perform arithmetic operations. The calculator interface consists of numeric buttons, operation buttons (+, -, *, /), and special function buttons (C for clear, CE for clear entry, +/- for negation, % for percentage, and . for decimal). The program utilizes event listeners to handle button clicks and updates the display accordingly.
The calculator supports addition, subtraction, multiplication, and division operations, along with decimal input and negation. It maintains an accumulator for storing intermediate results and appropriately handles sequential operations to ensure correct calculation behavior.
<form name="Keypad" action-xhr="#"> <table> <b> <table border=2 width=50 height=60 cellpadding=1 cellspacing=5> <tr> <td colspan=4 align=middle> <input name="ReadOut" type="Text" size=24 value="0" width=100%> </td> <td> <input name="btnClear" type="Button" value=" C " >Here is the screenshot of the calculator program and how it looks like in the web browser. You can further improve this script and format it as per the browser by using this JavaScript code to find browser information.
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JavaScript Calculator Program