JS basic _ other base numbers

<!DOCTYPE html>
<html>
	<head>
		<meta charset="UTF-8">
		<title></title>
		<script type="text/javascript">
			
			var a = 123;
			
			/*
			 * In js, if you need to represent a hexadecimal number, you need to start with 0x
			  * If you need to represent an octal number, you need to start with 0
			  * If you want to represent a binary number, you need to start with 0b
			  * But not all browsers support
			 * 	
			 */
			
			 //Hexadecimal
			a = 0x10;
			a = 0xff;
			a = 0xCafe;
			
			 //Octal number
			a = 070;
			
			 //Binary number
			//a = 0b10;
			
			 //For the string "070", some browsers will parse it as octal, and some will parse it as decimal
			a = "070";
			
			 //You can pass a second parameter in parseInt() to specify the base of the number
			a = parseInt(a,10);
			
			alert(typeof a);//number
			alert(a);       //70
			
		</script>
	</head>
	<body>
	</body>
</html>

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