JS Practice — Built-in Objects

Number.MAX_SAFE_INTEGER — isSafeInteger at boundary

📖 Usage Example

// Largest safely representable integer
Number.MAX_SAFE_INTEGER   // → 9007199254740991
Number.MAX_SAFE_INTEGER + 1 === Number.MAX_SAFE_INTEGER + 2   // → true (unsafe!)

Use Number.MAX_SAFE_INTEGER as the upper bound when working with integers to avoid silent precision loss.

isSafeInteger at the Boundary

Test Number.isSafeInteger exactly at and around MAX_SAFE_INTEGER.

💡 Hints (1)

• `isSafeInteger` returns `true` only for integers within the safe range.