JavaScript(JS) number method - issafeinteger

The Number.isSafeInteger method in JavaScript is a static method that checks whether a given value is a safe integer or not. A safe integer is an integer that can be exactly represented as a double-precision floating-point number. It returns true if the value is a safe integer, and false otherwise.

Here's an example usage:

console.log(Number.isSafeInteger(5)); // true
console.log(Number.isSafeInteger(5.0)); // true
console.log(Number.isSafeInteger(Number.MAX_SAFE_INTEGER)); // true
console.log(Number.isSafeInteger(Number.MAX_SAFE_INTEGER + 1)); // false
console.log(Number.isSafeInteger("5")); // false

In the above example, the Number.isSafeInteger method is used to check whether the given values are safe integers or not. The first two calls return true because 5 and 5.0 are both safe integers. The third call returns true because Number.MAX_SAFE_INTEGER is a safe integer. The fourth call returns false because Number.MAX_SAFE_INTEGER + 1 is not a safe integer. The fifth call returns false because "5" is a string and not a number.