JavaScript break和continue用法详细介绍

中断声明：break语句用于跳出循环。它可以用来"跳出" switch()语句。它中断循环并在循环后继续执行代码。
例子：

< !DOCTYPE html> < html > < head > < title > JavaScript Break statement < / title > < / head > < body style = "text-align:center; " > < div > < h1 > lsbin< / h1 > < h2 > JavaScript Break< / h2 > < / div > < p id = "GFG" > < / p > < script > var content = ""; var i; for (i = 1; i < 1000 ; i++) { if (i === 6) { break; } content += "Geeks" + i + "< br> "; } document.getElementById("GFG").innerHTML = content; < / script > < / body > < / html >

输出如下：

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继续声明：Continue语句在循环中"跳过"一个迭代。它中断循环中的迭代, 并继续执行循环中的下一个迭代。
例子：

< !DOCTYPE html> < html > < head > < title > JavaScript continue statement < / title > < / head > < body style = "text-align:center; " > < div > < h1 > lsbin< / h1 > < h2 > JavaScript continue< / h2 > < / div > < p id = "GFG" > < / p > < script > var content = ""; var i; for (i = 1; i < 7 ; i++) { if (i === 4) { continue; } content += "Geeks" + i + "< br> "; } document.getElementById("GFG").innerHTML = content; < / script > < / center > < / body > < / html >

输出如下：

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JavaScript标签：在JavaScript中, 标签语句被编写为带有标签名称和冒号的语句。
语法如下：

中断语句：它用于跳出没有标签参考的循环或开关, 而带有标签参考则用于跳出任何代码块。
break labelname;
继续声明：它曾经跳过有或没有标签引用的一次循环迭代。
continue labelname;

例子：本示例使用中断标签语句。

< !DOCTYPE html> < html > < head > < title > JavaScript continue statement < / title > < / head > < body style = "text-align:center; " > < div > < h1 style = "color:green; " > lsbin < / h1 > < h2 > JavaScript break< / h2 > < / div > < p id = "GFG" > < / p > < !-- Script to use break label --> < script > var val = ["Geeks1", "Geeks2", "Geeks3", "Geeks4", "Geeks5"]; var print = ""; breaklabel: { print += val[0] + "< br > " + val[1] + "< br > "; break breaklabel; print += val[2] + "< br > "+ val[3] + "< br > " + val[4]; }document.getElementById("GFG").innerHTML = print; < / script > < / body > < / html >

输出如下：

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【JavaScript break和continue用法详细介绍】例子：本示例使用继续标签。

< !DOCTYPE html> < html > < head > < title > JavaScript continue label < / title > < / head > < body style = "text-align:center" > < div > < h1 style = "color:green; " > lsbin < / h1 > < h2 > JavaScript continue< / h2 > < / div > < p id = "GFG" > < / p > < !-- Script to use continue label --> < script > var val = ["Geeks1", "Geeks2", "Geeks3", "Geeks4"]; var val1=["Geeks", "For", "Geeks"]var print = ""; print += val1[0] + "< br > "; print += val1[1] + "< br > "; print += val1[2] + "< br > "; continuelabel: { print += val[0] + "< br > "; print += val[1] + "< br > "; continue continuelabel; print += val[2] + "< br > "; print += val[3] + "< br > "; }document.getElementById("GFG").innerHTML = print; < / script > < / body > < / html >

输出如下：

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例子：本示例说明了不使用任何标签的情况。

< !DOCTYPE html> < html > < head > < title > No label in JavaScript < / title > < / head > < body style = "text-align:center; " > < div > < h1 style = "color:green; " > lsbin < / h1 > < h2 > JavaScript No label< / h2 > < / div > < p id = "GFG" > < / p > < script > var val = ["Geeks1", "Geeks2", "Geeks3", "Geeks4"]; var val1=["Geeks", "For", "Geeks"]var print = ""; labelloop:{ print += val1[0] + "< br > "; print += val1[1] + "< br > "; print += val1[2] + "< br > "; }print+="< br > "; labelloop1: { print += val[0] + "< br > "; print += val[1] + "< br > "; print += val[2] + "< br > "; print += val[3] + "< br > "; }document.getElementById("GFG").innerHTML = print; < / script > < / body > < / html >

输出如下：