# JavaScript: Check whether a variable is numeric or not

## JavaScript Math: Exercise-16 with Solution

Write a JavaScript function to check whether a variable is numerical or not.

Test Data:
console.log(is_Numeric(12));
console.log(is_Numeric('abcd'));
console.log(is_Numeric('12'));
console.log(is_Numeric(' '));
console.log(is_Numeric(1.20));
console.log(is_Numeric(-200));
Output:
true
false
true
false
true
true

Pictorial Presentation:

Sample Solution:-

HTML Code:

``````<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Check whether a variable is numeric or not</title>
</head>
<body>
</body>
</html>
```
```

JavaScript Code:

``````function is_Numeric(num) {
return !isNaN(parseFloat(num)) && isFinite(num);
}

console.log(is_Numeric(12));
console.log(is_Numeric('abcd'));
console.log(is_Numeric('12'));
console.log(is_Numeric(' '));
console.log(is_Numeric(1.20));
console.log(is_Numeric(-200));
```
```

Sample Output:

```true
false
true
false
true
true
```

Flowchart:

Live Demo:

See the Pen javascript-math-exercise-16 by w3resource (@w3resource) on CodePen.

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