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>
<head>
<meta charset="utf-8">
<title>JavaScript program to calculate age</title>
</head>
<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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Previous: Write a JavaScript function to convert a Unix timestamp to time.
Next: Write a JavaScript function to get the day of the month, 2 digits with leading zeros.
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