Addition of two numbers

Addition of two numbers- Using JavaScript statement we can perform arithmetic operations like +, -, *, /

E.g.

<html> 
<head> 
<title>Adding two numbers</title> 
</head> 
<body>
<center>
Add two Numbers
<form name="form1">  
Enter First Number: <input type="text" name="val1">  
Enter Second Number: <input type="text" name="val2">
<input type="button" onclick="valadd()" value="Add">  
</form>  
<script language="Javascript">
function valadd() 
{
var a=document.form1.val1.value;
var b=document.form1.val2.value;
if(a.length==0 || b.length==0)
{
alert("Please enter all required values")
}
else if(isNaN(a) || isNaN(b))
{
alert("Only number/s allowed in both fields")
}
else
{
var c= eval(a)+ eval(b); 
alert("Result is: " + c + "\nIf you like this post then please \nshare it using share buttons \ngiven below");  
} 
} 
</script>
</center>
</body> 
</html>

Check Output: Adding two numbers Add two Numbers

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