Lodash _.isSafeInteger() Method

Lodash _.isSafeInteger() method is used to find whether the given value is a safe integer or not. It returns True if the given value is a safe integer. Otherwise, it returns false. An integer is safe if it’s an IEEE-754 double-precision number(all integers from (2 ⁵³ – 1) to -(2 ⁵³ – 1)) which isn’t the result of a rounded unsafe integer.

Syntax:

_.isSafeInteger(value);

Parameters:

• value: This parameter holds the value to check.

Return Value:

This method returns true if the value is a safe integer, else false.

Example 1: In this example, we are checking whether the given value is a safe integer or not.

javascript

// Requiring lodash library
const _ = require('lodash');

// Use of _.isSafeInteger() method
// Passing a mathematical pow function as an argument
console.log(_.isSafeInteger(Math.pow(2, 53) - 1));

// Passing a maximum value of a number as an argument
console.log(_.isSafeInteger(Infinity));

// Passing a minimum value of a number as an argument
console.log(_.isSafeInteger(Number.MIN_VALUE));

Output:

true
false
false

Example 2: In this example, we are checking whether the given value is a safe integer or not.

javascript

// Requiring lodash library
const _ = require('lodash');

// Use of _.isSafeInteger() method
// Passing a positive number as an argument
console.log(_.isSafeInteger(123));

// Passing a negative number as an argument
console.log(_.isSafeInteger(-123));

// Passing a number(with decimals) as an argument
console.log(_.isSafeInteger(0.123));

Output:

true
true
false

Note: This code will not work in normal JavaScript because it requires the library lodash to be installed.

Reference: https://lodash.com/docs/4.17.15#isSafeInteger