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Home > List of blog posts > 练习 js变量、语句、表达式、函数定义及调用、匿名函数--1021
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练习 js变量、语句、表达式、函数定义及调用、匿名函数--1021
风吹的博客
Original
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实例

<!DOCTYPE html>
<html lang="en">
<head>
	<meta charset="UTF-8">
	<title>Document</title>
</head>
<body>
	
</body>
</html>
<!-- 练习js变量，语句，表达式 及函数调用-->
<script type="text/javascript">
	//变量用var定义
	//alert在浏览器用弹窗显示
var a = 123;
if(a>100){alert('是个老妖怪');}else{
	alert('是个小伙子')
}

var num = 666;
var num1 = 777;
if(num>num1){alret('大')}else{alert('小')}
//console.log在控制台打印
console.log('大');
//js函数
function x(a,b,c){
	var sum = a+b+c;
	return sum;
}
var res = x(1,2,3);
alert(res);

var c = function (a,b,c){
	var sum = a+b+c;
	return sum;
}
var s = c(6,6,6);
alert(s);

</script>

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效果图：10211.png10212.png10213.png10214.png10215.png




在js中定义变量用var，但是在引用变量时不用加var，直接书写变量名即可，alert();会以弹窗形式输出，console.log();会在控制台内打印



Correcting teacher：查无此人查无此人

Correction status：qualified

Teacher's comments：完成的不错，继续努力。
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