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JS variable plus
2022-07-07 04:50:00 【Big bug of xiaofeichan】
1. Update variables
2. Declare multiple variables
<!DOCTYPE html>
<html lang="en" xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta charset="utf-8" />
<title></title>
<script>
//1. Update variables
var myname = ' full name 1';
console.log(myname);
myname = ' full name 2';
console.log(myname);
//2. Declare multiple variables
var name = ' Sheep and sheep ',
age = 18,
temperamental = ' Silly autumn ';
console.log(name);
console.log(age);
console.log(temperamental);
</script>
</head>
<body>
</body>
</html>
3. Only declare (var) No assignment
( Undefined )
4. Do not declare No assignment Use it directly
( Report errors )
js: If an error is reported in the previous sentence, the next sentence will not be executed
5. Do not declare Direct assignment uses ------ correct
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