Question

Is "js infinity" equal to "infinity"?

Answer and Explanation

In JavaScript, the concept of "infinity" is represented by the global property Infinity. When we refer to "js infinity", we are generally talking about this specific property. Therefore, the question of whether "js infinity" is equal to "infinity" boils down to whether the JavaScript representation of infinity, denoted as Infinity, is equal to itself. The answer is yes, Infinity === Infinity will evaluate to true in JavaScript.

Let's delve deeper into understanding how JavaScript handles the concept of infinity:

1. The Infinity Property:

- JavaScript has a built-in global property named Infinity that represents the mathematical concept of positive infinity. It's a special numeric value that's greater than any other number. Similarly, -Infinity represents negative infinity.

2. Use Cases of Infinity:

- Infinity often appears as a result of mathematical operations where a number approaches an undefined limit, such as dividing by zero (e.g., 1 / 0 results in Infinity) or when a number exceeds the maximum representable value.

3. Comparison with Infinity:

- Comparing Infinity with itself using the strict equality operator (===) will return true because they both refer to the same concept and numerical representation of positive infinity. Any numeric value, other than Infinity itself, will be less than Infinity.

4. Example Code:

console.log(Infinity === Infinity); // Output: true
console.log(1 / 0); // Output: Infinity
console.log(Infinity > 1000000); // Output: true
console.log(Infinity > Infinity); // Output: false
console.log(-Infinity < -100); //Output: true

5. Important Note Regarding NaN:

- It's crucial to note that NaN (Not a Number) is not equal to itself. NaN === NaN evaluates to false. This is because NaN represents an invalid numerical result, and any comparison with NaN, even with another NaN, is not considered to be equal.

In summary, in JavaScript, Infinity is a special numeric value representing positive infinity, and when compared with itself using the strict equality operator, it evaluates to true. So, when we say "js infinity" is equal to "infinity," we mean Infinity === Infinity will return true, confirming the equality within the JavaScript environment.

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