JavaScript 循环控制语句-break和continue

news2024/11/12 23:02:00

break循环

首先i=0，判断i是否<=5,满足条件，判断i是否等于3，i不等于3，输出i=0，i的值加1，判断i是否<=5，判断i是否等于3，i不等于3，输出i=1，i的值加1，判断i是否<=5，判断i是否等于3，i不等于3，输出i=2，i的值加1，判断i是否<=5，判断i是否等于3，i等于3，跳出循环，结束

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <script>
        for(var i=0;i<=5;i++){
            if(i===3){
                break
            }
            console.log(i)
        }
    </script>
</body>
</html>

continue

i=0，判断i<=5,判断i是否等于3，不等于，输出i=0,i=i+1,

判断i<=5,判断i是否等于3，不等于,输出i=1，i=i+1,

判断i<=5,判断i是否等于3，不等于,输出i=2，i=i+1,

判断i<=5,判断i是否等于3，i等于3，跳过，之后的代码都不执行，i=i+1,

判断i<=5,判断i是否等于3，i不等于3，输出i=4，i=i+1,

判断i<=5,i等于5，结束

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <script>
        for(var i=0;i<=5;i++){
            if(i===3){
                continue
            }
            console.log(i)
        }
    </script>
</body>
</html>