how to use the isnumber function from the underscore library in javascript

To use the isNumber function from the Underscore library in JavaScript, you must first load the library onto your web page.

<script src="https://underscorejs.org/underscore-min.js"></script>
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Once the library is loaded, you can call the isNumber function to check if a value is a number.

index.tsx
_.isNumber(42); // true
_.isNumber("42"); // false
_.isNumber(NaN); // true
_.isNumber(Infinity); // true
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The isNumber function returns true if the value passed to it is a number, and false if it is not. It can be useful for type checking when you need to distinguish between numbers and strings or other data types.