Number Object

he Number object is a wrapper for primitive numeric values. It provides constants and methods for working with numbers. Number literals are automatically converted to Number objects when methods are called.

Key Points

• Constants: Number.MAX_VALUE, Number.MIN_VALUE, Number.POSITIVE_INFINITY, Number.NaN, etc.
• Methods: isFinite(), isNaN(), parseInt(), parseFloat().
• Instance methods: toFixed(), toPrecision(), toString().

Code Example

console.log(Number.MAX_VALUE); // 1.7976931348623157e+308
console.log(Number.isNaN(NaN)); // true
console.log(Number.isFinite(100)); // true

const num = 123.456;
console.log(num.toFixed(2)); // "123.46"
console.log(num.toPrecision(4)); // "123.5"
console.log(num.toString(16)); // "7b.74bc6a7ef9db" (hexadecimal)