JS Practice — Built-in Objects

Number.isFinite() — finite number returns true

📖 Usage Example

// Check for finite numbers (no coercion)
Number.isFinite(42)        // → true
Number.isFinite(Infinity)  // → false
Number.isFinite('42')      // → false

Use Number.isFinite() to safely check if a value is a finite number without coercing non-number types as the global isFinite() does.

Number.isFinite()

Number.isFinite(value) returns true if the value is a finite number. Unlike global isFinite(), it does not coerce the argument.

💡 Hints (1)

• Any regular number (including negatives and decimals) is finite.