The Number isInteger() method

Mar 14, 2019

Learn how the JavaScript Number.isInteger() method checks whether a value is an integer, returning false for decimals, strings, booleans, objects, and arrays.

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Returns true if the passed value is an integer. Anything else, booleans, strings, objects, arrays, returns false:

Number.isInteger(1) //true
Number.isInteger(-237) //true
Number.isInteger(0) //true

Number.isInteger(0.2) //false
Number.isInteger('Flavio') //false
Number.isInteger(true) //false
Number.isInteger({}) //false
Number.isInteger([1, 2, 3]) //false

Tagged: JavaScript · All topics

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