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Check if a number is Integer in JavaScript

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To check whether a given number is Integer, we have a isInteger method available on Number object in JavaScript.

The isInteger method will always return a Boolean value.

Number.isInteger(0); // true
Number.isInteger(245); // true
Number.isInteger(-123); // true
 
Number.isInteger(12.145); // false
Number.isInteger('1274'); // false
Number.isInteger('booo'); // false
Number.isInteger(NaN); // false
Number.isInteger(Infinity); // false
Number.isInteger(-Infinity); // false
Number.isInteger(true); // false
Number.isInteger(false); // false

Note: The Infinity,-Infinity and NaN will return false when used with Number.isInteger()

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