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//function that display value function dis(val) { document.getElementById(&quot;result&quot;).value+=val }</p> <pre class="language-nolang"><code> //function that evaluates the digit and return result function solve() { let x = document.getElementById(&quot;result&quot;).value let y = eval(x) document.getElementById(&quot;result&quot;).value = y } //function that clear the display function clr() { document.getElementById(&quot;result&quot;).value = &quot;&quot; } &lt;/script&gt; &lt;!-- for styling --&gt; &lt;style&gt; .title{ margin-bottom: 10px; text-align:center; width: 210px; color:green; border: solid black 2px; } input[type=&quot;button&quot;] { background-color:green; color: black; border: solid black 2px; width:100% } input[type=&quot;text&quot;] { background-color:white; border: solid black 2px; width:100% } &lt;/style&gt; </code></pre> <p></head></p> <!-- create table --> <p><body> <div class = title >GeeksforGeeks Calculator</div> <table border="1"> <tr> <td colspan="3"><input type="text" id="result"/></td> &lt;!-- clr() function will call clr to clear all value --&gt; <td><input type="button" value="c" onclick="clr()"/> </td> </tr> <tr> &lt;!-- create button and assign value to each button --&gt; &lt;!-- dis(&quot;1&quot;) will call function dis to display value --&gt; <td><input type="button" value="1" onclick="dis('1')"/> </td> <td><input type="button" value="2" onclick="dis('2')"/> </td> <td><input type="button" value="3" onclick="dis('3')"/> </td> <td><input type="button" value="/" onclick="dis('/')"/> </td> </tr> <tr> <td><input type="button" value="4" onclick="dis('4')"/> </td> <td><input type="button" value="5" onclick="dis('5')"/> </td> <td><input type="button" value="6" onclick="dis('6')"/> </td> <td><input type="button" value="-" onclick="dis('-')"/> </td> </tr> <tr> <td><input type="button" value="7" onclick="dis('7')"/> </td> <td><input type="button" value="8" onclick="dis('8')"/> </td> <td><input type="button" value="9" onclick="dis('9')"/> </td> <td><input type="button" value="+" onclick="dis('+')"/> </td> </tr> <tr> <td><input type="button" value="." onclick="dis('.')"/> </td> <td><input type="button" value="0" onclick="dis('0')"/> </td> &lt;!-- solve function call function solve to evaluate value --&gt; <td><input type="button" value="=" onclick="solve()"/> </td> <td><input type="button" value="*" onclick="dis('*')"/> </td> </tr> </table> </body> </html></p>

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