Ternary operator例子:在以上的例子中if-else语句被ternary operator如下替换 varuserInput = Number(prompt("Please enter a number"));varmessage = userInput % 2 == 0 ? "Your number is even" : "Your number is odd"; alert(message);
In JavaScript, the ternary operator also allows conditional chains where the right-side condition chains into another ternary operator. By chaining ternary operators, you effectively write an “if ...else if ... else” conditional chain. But, of course, you have to be careful that chaining the...
Learn the basics of the JavaScript Ternary OperatorTHE AHA STACK MASTERCLASS Now open with 50% off launch discount! The ternary operator is the only operator in JavaScript that works with 3 operands, and it’s a short way to express conditionals....
A ternary operator can be used to replace anif..elsestatement in certain situations. Before you learn about ternary operators, be sure to check theJavaScript if...else tutorial. What is a Ternary operator? A ternary operator evaluates a condition and executes a block of code based on the co...
One such feature is the ternary conditional operator, a shorthand method for writing conditional statements. This operator allows developers to evaluate a condition and return one of two values based on whether the condition is true or false. ADVERTISEMENT In this tutorial, we will explore how to...
条件(三元)运算符是JavaScript 唯一使用三个操作数的运算符:一个条件后跟一个问号(?),如果条件为真值,则执行冒号(:)前的表达式;若条件为假值,则执行最后的表达式。该运算符经常当作 if...else 语句的简捷形式来使用。 尝试一下语法 jsCopy to Clipboard condition ? exprIfTrue : exprIfFalse 参数 condition...
{ // does nothing } // good function createHero( firstName, lastName, inventorOf, ) { // does nothing } // good (note that a comma must not appear after a "rest" element) function createHero( firstName, lastName, inventorOf, ...heroArgs ) { // does nothing } // bad createHero...
OperatorNameExample =Assignx = 5Try it » +Additionx = y + 2Try it » *Multiplicationx = y * 2Try it » !=Equal tox == 8Try it » >Greater thanx > 8Try it » ||OR(x > 0 || x > 0)Try it » ❮ PreviousNext ❯ ...
If the conditions are not met, nothing will be rendered; If we use the ternary operator, how do we do it? { this.state.isLogin ? {this.state.username} : null } In fact, we can simplify the operationlogical AND &&: { this.state...
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