| sitelink1 | http://blog.daum.net/bellocan/15605809 |
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| sitelink2 | http://multimedia.kaywon.ac.kr:2009/2005..._isNaN.htm |
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1. isFinite() - The isFinite() function is used to check if a value is a finite number.
괄호안의 값이 유한의 수인지 아닌지를 판단하여 true 나 false를 return 해 줍니다.
재미있는 것은 isFinite("5678") 처럼 숫자형 문자열도 true입니다.
Ex)
<SCRIPT LANGUAGE="JavaScript">
<!--
document.write("isFinite(12345) ===>" + isFinite(12345) + "<br>");
document.write("isFinite('12345') ===>" + isFinite('12345') + "<br>");
document.write("isFinite(12.345) ===>" + isFinite(12.345) + "<br>");
document.write("isFinite(5+6*7) ===>" + isFinite(5+6*7) + "<br>");
document.write("isFinite(012345) ===>" + isFinite(012345) + "<br><br>");
document.write("isFinite('우리나라') ===>" + isFinite('우리나라') + "<br>");
document.write("isFinite('korea') ===>" + isFinite('korea') + "<br>");
document.write("isFinite('12345우리나라') ===>" + isFinite('12345우리나라') + "<br>");
//-->
</SCRIPT>
>> 결과
isFinite(12345) ===>true
isFinite('12345') ===>true
isFinite(12.345) ===>true
isFinite(5+6*7) ===>true
isFinite(012345) ===>true
isFinite('우리나라') ===>false
isFinite('korea') ===>false
isFinite('12345우리나라') ===>false
Ex)<SCRIPT LANGUAGE="JavaScript"><!--document.write("isNaN('12345') ===> " + isNaN('12345') + "<br>");document.write("isNaN(12.345) ===> " + isNaN(12.345) + "<br>");document.write("isNaN('우리나라') ===> " + isNaN('우리나라') + "<br>");//--></SCRIPT>>> 결과isNaN('12345') ===> false
isNaN(12.345) ===> false
isNaN('우리나라') ===> true
