JavaScript Number.MAX_SAFE_INTEGER

The MAX_SAFE_INTEGER constant has a value of 253 - 1 (9007199254740991).

It is a non-writable, non-enumerable, and non-configurable property.

"Safe" refers to the ability of JavaScript to represent integers exactly and to correctly compare them.

The syntax to access the MAX_SAFE_INTEGER constant is:


MAX_SAFE_INTEGER is accessed using the Number class name.

Example: Value of Number.MAX_SAFE_INTEGER

value = Number.MAX_SAFE_INTEGER;
console.log(value); // 9007199254740991

value_plus_1 = value + 1;
value_plus_2 = value + 2;
// JS Number cannot exactly represent integers greater than 'value'
// and correctly compare them
console.log(value_plus_1 == value_plus_2); // true



Note: If you have to use integers greater than MAX_SAFE_INTEGER, consider using BigInt.

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