JavaScript includes three forms of if condition: if condition, if else condition and else if condition. The if condition must have conditional expression in brackets () followed by single statement or code block wrapped with . 'else if' statement must be placed after if condition. It can be ...
We can omit { } in if…else statements when we have a single line of code to execute. For example, let num = 4; // if condition if (num % 2 == 0) console.log("even number"); else console.log("odd number"); // Output: even number Run Code JavaScript...
这时候在开发代码上的体现就是代码库急剧膨胀,业务扩张自然会扩招,新同事也会在已有的代码上打补丁,在这些补丁式的需求下,曾经的if else会指数级的混乱,一个简单的需求都可能挑战现有的状态分支。这种“坏味道”不加以干预,整个项目的生命力直接走向暮年。 代码语言:javascript 代码运行次数:0 运行 AI代码解释 //...
JavaScript var isRaining = false; if (isRaining) { alert("Don't forget an umbrella!"); } else { alert("No need for an umbrella."); } Live Example The moment we run the code, we get the second alert, just as we expected. Also notice the body of else. Just like that of if,...
if s == 'JavaScript' or s == 'jQuery' or s == 'ZinoUI': print(s + ' Tutorial') Output: jQuery Tutorial Write an if-else in a single line of code You can write an if-else statement in one line using a ternary expression. This can make the code more concise. ...
else： 执行语句…… 其中”判断条件”成立时（非零），则执行后面的语句，而执行内容可以多行，...
ElseYou can provide a second part to the if statement: else.You attach a statement that is going to be executed if the if condition is false:if (true) { //do something } else { //do something else }Since else accepts a statement, you can nest another if/else statement inside it:...
条件语句之else if 在很多时候,条件语句 else if 和 条件运算符 可以 相互替代, 他们的逻辑都是一样的。 只有两种情况, 只有两种结果。 唯一不同的是条件运算符的判断条件必须是一个 布尔值。 如果不能给转换为布尔值, 那么 就不能够使用 条件运算符进行判断输出。......
elseif(school =="Ardross Primary") {group="/Primary/Ardross Primary/"; domain ="AlnessAcademy.org.uk"; schoolType ="Primary";} elseif(school =="Arisaig Primary") {group="/Primary/Arisaig Primary/"; domain ="MallaigHigh.org.uk"; schoolType ="Primary";} ...
This statement also contains a single line or a bunch of code, likeifstatements. But, it will be executed, once the condition onifstatements go wrong, meaning that, onceifreturns false. Now, let us have a glance at the following code which has two blocks,ifandelse. ...