Underscore.js _.isNumber() function is used to check whether the given object parameter is a number or not. If the given object is a number then it returns True value otherwise, it returns False.
Syntax:
_.isNumber( object );Parameters:
- object: This parameter holds the object element that needs to be checked whether it is a number or not.
Return Value:
It returns True if the given object is a number, and False otherwise.
Example 1: This example shows the use of the Underscore.js _.isNumber() Function.
<!DOCTYPE html>
<html>
<head>
<script type="text/javascript" src=
"https://cdnjs.cloudflare.com/ajax/libs/underscore.js/1.9.1/underscore-min.js">
</script>
</head>
<body>
<script type="text/javascript">
let arr = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9];
console.log(_.isNumber(arr));
let fun = function (element) {
return element % 2 != 0;
};
console.log(_.isNumber(fun));
let str = 'GeeksforGeeks';
console.log(_.isNumber(str.length));
</script>
</body>
</html>
Output:
Example 2: This example shows the use of the Underscore.js _.isNumber() Function.
<!DOCTYPE html>
<html>
<head>
<script type="text/javascript" src=
"https://cdnjs.cloudflare.com/ajax/libs/underscore.js/1.9.1/underscore-min.js">
</script>
</head>
<body>
<script type="text/javascript">
console.log(_.isNumber(true));
console.log(_.isNumber(10));
console.log(_.isNumber('GeeksforGeeks'));
console.log(_.isNumber(15.675));
</script>
</body>
</html>
Output:
