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Learn about the three main uses of the ? operator in JavaScript: ternary operator, optional chaining, and nullish coalescing. See examples, comparisons, and benefits of this powerful feature.
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BetaThe conditional (ternary) operator is the only JavaScript operator that takes three operands: a condition followed by a question mark (?), then an expression to execute if the condition is truthy followed by a colon (:), and finally the expression to execute if the condition is falsy. This operator is frequently used as an alternative to an if...else statement.
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BetaIf you see any more funny symbols in JavaScript, you should try looking up JavaScript's operators first: Mozilla Developer Center's list of operators. The one exception you're likely to encounter is the $ symbol. To answer your question, conditional operators replace simple if statements. An example is best:
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BetaLearn how to use the if statement and the conditional operator ? to perform different actions based on different conditions in JavaScript. See examples, syntax, and comparison with if..else.
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BetaLearn three different meanings and uses of the question mark (?) operator in JavaScript: ternary, null coalescing, and optional chaining. See syntax, examples, and contrast with other operators.
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BetaHow to Correctly Use the JavaScript Question Mark Operator Question marks are useful in JavaScript for quickly assigning a different value to a variable based on a condition, a very common task: let [profit, costs] = [120000, 100000] // It was a good month // Employee bonus structure: $1000 if >10% profit, $100 if not let employeeBonus = (profit/costs > 1.10) ? 1000 : 100 console.log ...
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BetaLearn how to use the ? operator for ternary, optional chaining, nullish coalescing and combined operations in JavaScript. Compare the ? operator to alternatives like if/else statements and see examples and benchmarks.
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BetaLearn how to use the question mark operator (?) in JavaScript for conditional expressions and optional chaining. See how it works in different frameworks like React, Vue, Angular and Svelte.
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BetaJavaScript operators are symbols or keywords used to perform operations on values and variables. They are the building blocks of JavaScript expressions and can manipulate data in various ways.JavaScript OperatorsThere are various operators supported by JavaScript.1. ... Some of the common interview questions in JavaScript on OOPS include: How ...
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BetaLearn how to use the optional chaining (?.) operator to access an object's property or call a function without throwing an error if the reference is nullish. See syntax, examples, and limitations of this feature.
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