前言：
现在朋友们对“java输出nan怎么解决”大体比较看重，姐妹们都需要了解一些“java输出nan怎么解决”的相关文章。那么小编也在网络上搜集了一些关于“java输出nan怎么解决””的相关内容，希望咱们能喜欢，兄弟们快快来学习一下吧！例 4.2.1
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
<head>
<meta http-equiv="content-type" content="text/html; charset=utf-8"/>
</head>
<BODY>
<SCRIPT LANGUAGE="JavaScript">
<!--
/*favo说isNaN是Global的方法， 而不是window的方法*/
var b1 = window.isNaN("25");
var b2 = isNaN("abc");
document.write("b1="+b1+",b2="+b2)
//-->
</SCRIPT>
</BODY>
</HTML>
输出结果：
b1=false,b2=true
篇幅有限更多请见扩展链接：「链接」
javascript当中parseFloat用法
parseFloat
马克- to-win：马克 java社区：防盗版实名手机尾号： 73203。
例 4.3.1
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
<head>
<meta http-equiv="content-type" content="text/html; charset=utf-8"/>
</head>
<BODY>
<SCRIPT LANGUAGE="JavaScript">
<!--
/* 马克-to-win
parseFloat() (Function/global)
Parse a string to extract a floating-point value.
Property/method value type: Number primitive
JavaScript syntax: - parseFloat(aNumericString)
Argument list: aNumericString A meaningful numeric value.
The parseFloat() function returns a numeric value is returned, unless the string cannot be resolved to a meaningful value in which case NaN is returned instead.
It produces a number value dictated by interpreting the contents of the string as if it were a decimal literal value. During conversion parseFloat() ignores leading whitespace characters so you don't have to remove them from the string before conversion takes place.
Note that parseFloat() will only process the leading portion of the string. As soon as it encounters an invalid floating-point numeric character it will assume the scanning is complete. It will then silently ignore any remaining characters in the input argument.
*/
var x = parseFloat("727.079")
var y = parseFloat("77.079xyz")
var z= parseFloat("xyz77.079")
document.write("x="+x+",y="+y+",z="+z)
//-->
</SCRIPT>
</BODY>
</HTML>
篇幅有限更多请见扩展链接：
标签： #java输出nan怎么解决 #js里的isnan #js中isnan的用法
