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co2-1.html
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<html>
<head>
<title>String Functions</title>
<script>
function strings()
{
var s=document.getElementById('str').value;
fst=s.charAt(0);
document.getElementById('first').value=fst;
lw=s.toLowerCase();
document.getElementById('lower').value=lw;
up=s.toUpperCase();
document.getElementById('upper').value=up;
rv=s.reverse()
document.getElementById('rev').value=rv;
}
function cont()
{
var s=document.getElementById('str').value;
var s1=document.getElementById('con').value;
cont=s.concat(s1);
document.getElementById('conct').value=cont;
}
function replace()
{
var s=document.getElementById('conct').value;
var s2=document.getElementById('old').value;
var s3=document.getElementById('new').value;
ns=s.replace(s2,s3);
document.getElementById('news').value=ns;
}
function index()
{
var s=document.getElementById('news').value;
var i=document.getElementById('element').value;
ind=s.indexOf(i);
document.getElementById('indexx').value=ind;
}
function slice()
{
var s=document.getElementById('news').value;
var s2=document.getElementById('start').value;
var s3=document.getElementById('end').value;
sl=s.slice(s2,s3);
document.getElementById('sl').value=sl;
}
function reverse()
{
var s=document.getElementById('news').value;
sl=s.reverse(s2,s3);
document.getElementById('sl').value=sl;
}
function round()
{
var s=document.getElementById('f1').value;
re=Math.round(s);
document.getElementById('r').value=re;
}
function sqroot()
{
var s=document.getElementById('f1').value;
re=Math.sqrt(s);
document.getElementById('r').value=re;
}
function ceil()
{
var s=document.getElementById('f1').value;
re=Math.ceil(s);
document.getElementById('r').value=re;
}
function floor()
{
var s=document.getElementById('f1').value;
re=Math.floor(s);
document.getElementById('r').value=re;
}
function log()
{
var s=document.getElementById('f1').value;
re=Math.log(s);
document.getElementById('r').value=re;
}
</script>
</head>
<body>
<center><b><h1>String Functions</h1></b></center>
<br>
<table align="center">
<tr>
<th>
<label for="">Enter a String</label>
</th>
<th>:</th>
<td>
<input type="text" id='str'>
</td>
<td><button onclick="strings()">ok</button></td>
</tr>
<tr>
<th>
<label for="" style="font-size: 1em;">Element at first position</label>
</th>
<th>:</th>
<td>
<input type="text" id='first'>
</td>
</tr>
<tr>
<th>
<label for="" style="font-size: 1em;">To lower case</label>
</th>
<th>:</th>
<td>
<input type="text" id='lower'>
</td>
</tr>
<tr>
<th>
<label for="" style="font-size: 1em;">To upper case</label>
</th>
<th>:</th>
<td>
<input type="text" id='upper'>
</td>
</tr>
<tr>
<th>
<label for="" style="font-size: 1em;">Enter String to concat</label>
</th>
<th>:</th>
<td>
<input type="text" id='con'>
</td>
<td><button onclick="cont()">ok</button></td>
<td>
<input type="text" id='conct'>
</td>
</tr>
<tr>
<th>
<label for="" style="font-size: 1em;">Enter string to be replaced</label>
</th>
<th>:</th>
<td>
<input type="text" id='old'>
</td>
</tr>
<tr>
<th>
<label for="" style="font-size: 1em;">Enter new string</label>
</th>
<th>:</th>
<td>
<input type="text" id='new'>
</td>
<td><button onclick="replace()">ok</button></td>
</tr>
<tr>
<th>
<label for="" style="font-size: 1em;">New string</label>
</th>
<th>:</th>
<td>
<input type="text" id='news'>
</td>
</tr>
<tr>
<th>
<label for="" style="font-size: 1em;">Enter the element to get its index value</label>
</th>
<th>:</th>
<td>
<input type="text" id='element'>
</td>
<td><button onclick="index()">ok</button></td>
<td>
<input type="text" id='indexx'>
</td>
</tr>
<tr>
<th>
<label for="" style="font-size: 1em;">Enter starting index to Slice</label>
</th>
<th>:</th>
<td>
<input type="number" id='start'>
</td>
</tr>
<tr>
<th>
<label for="" style="font-size: 1em;">Enter ending index to Slice</label>
</th>
<th>:</th>
<td>
<input type="number" id='end'>
</td>
<td><button onclick="slice()">ok</button></td>
<td>
<input type="text" id='sl'>
</td>
</tr>
</table>
<h1 align="center">Math Functions</h1>
<table align="center">
<tr><td>Enter the number:</td></tr>
<tr><td><input id="f1"></td></tr>
<tr><td>
<button onclick="round()">ROUND</button>
<button onclick="floor()">FLOOR</button>
<button onclick="ceil()">CEIL</button>
<button onclick="sqroot()">SQRT</button>
<button onclick="log()">LOG</button></td></tr>
<tr><td></td></tr>
<tr><td align="center"> RESULT: <input id="r"><br></td></tr></td></tr>
</table>
</body>
</html>