注意:在 Javascript 中没有 elseif (一个单词)关键字。 do-while语句 语法 AI检测代码解析 do statement while (condition); 1. 2. 3. do…while 语句创建一个执行指定语句的循环,直到condition值为 false。在执行statement 后检测condition,所以指定的statement至少执行一次。简而言之 先执行代码部分然后再判断 s...
// Code to execute if condition is true } else { // Code to execute if condition is false } 在这个if-else语句中,如果“condition”是true,第一个代码块就会执行。如果“condition”是false,第二个代码块就会执行。 JavaScript还提供了if-else if语句,允许在多个条件之间进行选择。以下是一个示例if-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:if (a === true) { //do something } else if (b === ...
The else statement is another conditional statement in JavaScript. Unlike if, it couldn't be specified alone — there has to be an if statement preceding an else. So what's else used for? The else statement executes a piece of code if the condition in the preceding if statement isn't me...
However, as in life, things are rarely black or white… there are always shades of grey.The JavaScript if – else statements also provides for else if clauses through which we can make additional branches to the condition.Sponsored Links...
La operación condicional es una de las concepciones básicas de codificación para cualquier lenguaje de programación. La convención es inferir el resultado de mejor ajuste a partir de múltiples condiciones disponibles. JavaScript admite tanto la estructura habitual if...else como los operadores...
if(condition) { // Code to be executed if condition is true } else { // Code to be executed if condition is false } The JavaScript code in the following example will output "Have a nice weekend!" if the current day is Friday, otherwise it will output the text "Have a nice day!"...
What happens if multiple conditions in the "else if" sequence are true? In most programming languages, when multiple conditions in the "else if" sequence are true, only the code block associated with the first true condition is executed. The program doesn't check the subsequent conditions once...
execute if condition2 is true } else { execute if neither condition1 nor condition2 is true } Example Program A renowned club in the town want to create a program to vet the age of the people applying for membership. They want to only allow people older than 18. For senior citizens, ...
Use if-else conditional statements to control the program flow. 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 . ...