Renewal·서른의 생활코딩

Sample Source 1) JavaScript Basics (if and if-else Statements)

normalstory

April 5, 2011·2 min read

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if statement

Example 5)

<head>

<title> IF statement </title>

</head>

<body>

//<!CDATA[

var reply=confirm("I will study hard");

if(reply==true){

alert("Yes study hard");

}

//]]]]>

</script>

</body>

</html>

if-else statement

Example 6)

Basic condition

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"

"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<head>

<title> IF-else statement </title>

</head>

<body>

//<!CDATA[

var age=20;

if(age>=20){

alert("Entry allowed");

}else{

alert("Entry denied");

}

//]]]]>

</script>

</body>

</html>

Add conditions

	<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
	"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
	<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="ko" lang="ko">

	<head>
	<meta http-equiv="Content-Type" content="application/xhtml+xml; charset=UTF-8" />
	<title> IF else 문 </title>
	<meta name="Keywords" content="" />
	<meta name="Description" content="" />
	</head>

	<body>
	<script type="text/javascript">
	//<!CDATA[
	var age=17;
	var sex="men";
	/* Conditions: ages 17~19, only males allowed
	var reply1=confirm("Are you 17~19?");
	var reply2=confirm("Are you male?");

	if(reply1==true){
	if(reply2==true);
	alert("Please enter.");
	}else{
	alert("Entry denied.");
	}
	*/
	if((age>=17&&age<=19)&&sex=="men"){
	alert("Pass.");
	}else{
	alert("Fail.");
	}
	//]]]]>
	</script>
	</body>

	</html> Add conditions

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"

"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<head>

<title> Conditional 3 </title>

</head>

<body>

//<!CDATA[

var name=prompt("Enter your name","");

document.write(name);

if(name==null){

alert(name+", nice to meet you..");

}else{

alert("I told you to enter your name");

}

if(name==""){

alert("I told you to enter your name");

}else{

alert(name+", nice to meet you..");

}

//]]]]>

</script>

</body>

</html>

Applied conditions

	<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
	"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
	<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="ko" lang="ko">

	<head>
	<meta http-equiv="Content-Type" content="application/xhtml+xml; charset=UTF-8" />
	<title> Conditional 4 </title>
	<meta name="Keywords" content="" />
	<meta name="Description" content="" />
	</head>
	<body>

	<script type="text/javascript">
	//<!CDATA[
	var number=prompt("Enter a number you like","");
	document.write(number);

	if(number%2==0){
	alert("It is even.");
	}else{
	alert("It is odd.");
	}
	//]]]]>
	</script>

	</body>
	</html>

This English version was translated by Claude.

#//#CDATA #document.write #else if #JavaScript #Noscript #소스공개 #자바스크립트 #자바스크립트 공부 #자바스크립트 기초 #자바스크립트 기초강의 #자바스크립트 스터디

Written by

친절한 찰쓰씨

Pleasant Charles — UI/UX researcher at AIT. Keeping notes on design, planning, and slow days here since 2010.

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