JavaScript: Get ISO-8601 numeric representation of the day of the week
JavaScript Datetime: Exercise-22 with Solution
Write a JavaScript function to get an ISO-8601 numeric representation of the day of the week (1 (for Monday) to 7 (for Sunday).
Test Data :
dt = new Date();
console.log(ISO_numeric_date(dt));
4
dt = new Date(2015, 10, 1);
console.log(ISO_numeric_date(dt));
7
Sample Solution:-
HTML Code:
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>JavaScript function to get ISO-8601 numeric representation of the day of the week (1 (for Monday) to 7 (for Sunday))</title>
</head>
<body>
</body>
</html>
JavaScript Code:
function ISO_numeric_date(dt)
{
return (dt.getDay() === 0 ? 7 : dt.getDay());
}
dt = new Date();
console.log(ISO_numeric_date(dt));
dt = new Date(2015, 10, 1);
console.log(ISO_numeric_date(dt));
Sample Output:
3 7
Flowchart:

Live Demo:
See the Pen JavaScript - Get ISO-8601 numeric representation of the day of the week-date-ex-22 by w3resource (@w3resource) on CodePen.
Improve this sample solution and post your code through Disqus
Previous: Write a JavaScript function to get a full textual representation of the day of the week (Sunday through Saturday).
Next: Write a JavaScript function to get English ordinal suffix for the day of the month, 2 characters (st, nd, rd or th.).
What is the difficulty level of this exercise?
Test your Programming skills with w3resource's quiz.
- Weekly Trends
- Python Interview Questions and Answers: Comprehensive Guide
- Scala Exercises, Practice, Solution
- Kotlin Exercises practice with solution
- MongoDB Exercises, Practice, Solution
- SQL Exercises, Practice, Solution - JOINS
- Java Basic Programming Exercises
- SQL Subqueries
- Adventureworks Database Exercises
- C# Sharp Basic Exercises
- SQL COUNT() with distinct
- JavaScript String Exercises
- JavaScript HTML Form Validation
- Java Collection Exercises
- SQL COUNT() function
- SQL Inner Join