lovecoding
/
web0715


			
				
					
						
						
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							<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <script>
        function jc(num){
            var countNum = 1;
            for(var i=1;i<=num;i++){
                countNum *= i;
            }
            return countNum;
        }
        console.log(jc(10));
    </script>
</body>
</html>