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<html lang="en">
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<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Document</title>
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<body>
<script>
//js函数的书写
function myFunction() {
console.log("你好");
}
//左边是funcion关键字 后面是函数名，里面写表达式
//带参数的两种写法
//1.在函数里面写实参
function myFunction(num,time,action) {
var num=7,time="点",action="起床";
console.log(num + time + action);
}
//2.在调用函数的时候写实参
function myFunction(num,time,action) {
console.log(num + time + action);
}
myFunction("7", "点","起床");
//带返回值写法
function myFunction(a,b){
var a=5,b=6;
return a+b;
}
//外面接受返回值
function num(a,b) {
return c=a+b;
}
var z=num(7,8); //通过=把return的值获取到
console.log(z);
</script>
</body>
</html>
坚持是一种习惯，认真是一种态度，每一篇都要用心写
