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📄 21.html

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<html>
	<body>
		<script language="JavaScript">
			document.write(eval("3+5*2"));				document.write("<br>");		
			document.write(eval("2*3.14*10"));			document.write("<hr>");		
			
			document.write(parseInt("21"));				document.write("<br>");	
			document.write(parseInt("21",8));			document.write("<br>");		
			document.write(parseInt("021"));			document.write("<br>");		
			document.write(parseInt("0x21"));			document.write("<br>");
			document.write(parseInt("456a"));			document.write("<br>");		
			document.write(parseInt("a123"));			document.write("<hr>");		

			document.write(parseFloat("3.14"));			document.write("<br>");		
			document.write(parseFloat("2e3"));			document.write("<br>");		
			document.write(parseFloat("5.67kkk"));		document.write("<br>");		
			document.write(parseFloat("kkk5.67"));		document.write("<hr>");		
			
			var v1 = parseInt("a123");
			document.write(isNaN(v1));					document.write("<br>");		
			document.write(isNaN(123));					document.write("<br>");		
		</script>
	</body>
</html>

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