Check Prime Number

A prime number (or a prime) is a natural number greater than 1 that is not a product of two smaller natural numbers.

Prime numbers are numbers that have only 2 factors: 1 and themselves.
Check the number is prime number or not , enter any number.


Output here
<html>
<head>
<title></title>
</head>
<body>
<input type="text" name="t1" id="t1">
<input type="button" value="Submit" onclick="check_prime()">
<div id=d1></div>
<script type="text/javascript">
function check_prime(){
x=document.getElementById("t1").value
x=parseInt(x)
if(Number.isInteger(x)){
str='';
	
flag=0	
for(j=2;j<x;j++){
	if(x%j == 0){
	flag=1
	break;
	}
	
}	
 if(flag==0){
	str= x + " Is a Prime Number ";
}else{
str= x + " Is not a Prime Number ( Composite Number ) ";
}
document.getElementById('d1').innerHTML= str
}else{
document.getElementById('d1').innerHTML="Enter an Integer  "	
}
}
</script>
</body>
</html>
isInteger()Checking if input number is integer or not
parseInt()function to convert string to number

Next lower value of any decimal number JavaScript variable
JavaScript Math Reference

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