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js file and index.html changed #1

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8 changes: 8 additions & 0 deletions .idea/.gitignore
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8 changes: 8 additions & 0 deletions .idea/Simple-Calculator.iml
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6 changes: 6 additions & 0 deletions .idea/misc.xml
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8 changes: 8 additions & 0 deletions .idea/modules.xml
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6 changes: 6 additions & 0 deletions .idea/vcs.xml
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68 changes: 34 additions & 34 deletions index.html
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Original file line number Diff line number Diff line change
Expand Up @@ -9,41 +9,41 @@

<body>

<table class="calculator">
<tr>
<td colspan="3"><input class="display-box" type="text" id="result" disabled /></td>
<!-- clearScreen() function clear all the values -->
<td><input class="button" type="button" value="C" onclick="clearScreen()" style="background-color: #fb0066;" /> </td>
</tr>
<tr>
<!-- display() function display the value of clicked button -->
<td><input class="button" type="button" value="1" onclick="display('1')" /> </td>
<td><input class="button" type="button" value="2" onclick="display('2')" /> </td>
<td><input class="button" type="button" value="3" onclick="display('3')" /> </td>
<td><input class="button" type="button" value="/" onclick="display('/')" /> </td>
</tr>
<tr>
<td><input class="button" type="button" value="4" onclick="display('4')" /> </td>
<td><input class="button" type="button" value="5" onclick="display('5')" /> </td>
<td><input class="button" type="button" value="6" onclick="display('6')" /> </td>
<td><input class="button" type="button" value="-" onclick="display('-')" /> </td>
</tr>
<tr>
<td><input class="button" type="button" value="7" onclick="display('7')" /> </td>
<td><input class="button" type="button" value="8" onclick="display('8')" /> </td>
<td><input class="button" type="button" value="9" onclick="display('9')" /> </td>
<td><input class="button" type="button" value="+" onclick="display('+')" /> </td>
</tr>
<tr>
<td><input class="button" type="button" value="." onclick="display('.')" /> </td>
<td><input class="button" type="button" value="0" onclick="display('0')" /> </td>
<!-- calculate() function evaluate the mathematical expression -->
<td><input class="button" type="button" value="=" onclick="calculate()" style="background-color: #fb0066;" /> </td>
<td><input class="button" type="button" value="*" onclick="display('*')" /> </td>
</tr>
</table>
<table class="calculator">
<tr>
<td colspan="3"><input class="display-box" type="text" id="result" disabled /></td>
<!-- clearScreen() function clear all the values -->
<td><input class="button" type="button" value="C" onclick="clearScreen()" style="background-color: #fb0066;" /> </td>
</tr>
<tr>
<!-- display() function display the value of clicked button -->
<td><input class="button btn" type="button" value="1" /> </td>
<td><input class="button btn" type="button" value="2" /> </td>
<td><input class="button btn" type="button" value="3" /> </td>
<td><input class="button btn" type="button" value="/" /> </td>
</tr>
<tr>
<td><input class="button btn" type="button" value="4" /> </td>
<td><input class="button btn" type="button" value="5" /> </td>
<td><input class="button btn" type="button" value="6" /> </td>
<td><input class="button btn" type="button" value="-" /> </td>
</tr>
<tr>
<td><input class="button btn" type="button" value="7" /> </td>
<td><input class="button btn" type="button" value="8" /> </td>
<td><input class="button btn" type="button" value="9" /> </td>
<td><input class="button btn" type="button" value="+" /> </td>
</tr>
<tr>
<td><input class="button btn" type="button" value="." /> </td>
<td><input class="button btn" type="button" value="0" /> </td>
<!-- calculate() function evaluate the mathematical expression -->
<td><input class="button" type="button" value="=" onclick="calculate()" style="background-color: #fb0066;" /> </td>
<td><input class="button btn" type="button" value="*" /> </td>
</tr>
</table>

<script type="text/javascript" src="script.js"></script>
<script type="text/javascript" src="script.js"></script>
</body>

</html>
28 changes: 24 additions & 4 deletions script.js
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Original file line number Diff line number Diff line change
@@ -1,17 +1,37 @@
let result = document.getElementById("result")
let btn = document.querySelectorAll('.btn')
btn.forEach(function (btn) {
btn.addEventListener('click', function () {
display(btn.value)
})
})


// This function clear all the values
function clearScreen() {
document.getElementById("result").value = "";
result.value = "";
}


// This function display values
function display(value) {
document.getElementById("result").value += value;
if (value=='+' ||value=='-' || value=='*'||value=='/'){
if (result.value[result.value.length-1] == '+' ||
result.value[result.value.length-1] == '-' ||
result.value[result.value.length-1] == '*' ||
result.value[result.value.length-1] == '/' ){

} else {result.value += value;}
} else {

result.value += value;

}
}

// This function evaluates the expression and return result
function calculate() {
var p = document.getElementById("result").value;
var p = result.value;
var q = eval(p);
document.getElementById("result").value = q;
result.value = q;
}