# JavaScript: Calculate age

## JavaScript Datetime: Exercise-18 with Solution

Write a JavaScript program to calculate age.

Test Data:
console.log(calculate_age(new Date(1982, 11, 4)));
35
console.log(calculate_age(new Date(1962, 1, 1)));
56

Sample Solution:-

HTML Code:

``````<!DOCTYPE html>
<html>
<meta charset="utf-8">
<title>JavaScript program to calculate age</title>
<body>

</body>
</html>
```
```

JavaScript Code:

``````function calculate_age(dob) {
var diff_ms = Date.now() - dob.getTime();
var age_dt = new Date(diff_ms);

return Math.abs(age_dt.getUTCFullYear() - 1970);
}

console.log(calculate_age(new Date(1982, 11, 4)));

console.log(calculate_age(new Date(1962, 1, 1)));
```
```

Sample Output:

```35
56
```

Flowchart:

Live Demo:

See the Pen JavaScript - Calculate age-date-ex-18 by w3resource (@w3resource) on CodePen.

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﻿

## JavaScript: Tips of the Day

Removes elements in an array until the passed function returns true. Returns the removed elements.

Example:

```const tips_remove = (arr, func) => {
for (const [i, val] of arr.entries()) if (func(val)) return arr.slice(0, i);
return arr;
};

console.log(tips_remove([1, 2, 3, 4, 5, 6], n => n >= 5));
```

Output:

```[1, 2, 3, 4]
```