JavaScript: Get the week end date

JavaScript Datetime: Exercise-51 with Solution

Week End Date

Write a JavaScript function to get the week end date.

Sample Solution:

JavaScript Code:

// Define a function called endOfWeek which calculates the ending date of the week for a given input date.
function endOfWeek(date)
  {
    // Calculate the date of the last day of the week by adding the difference between the day of the month and the day of the week, then adding 6.
    var lastday = date.getDate() - (date.getDay() - 1) + 6;
    // Set the date to the calculated last day of the week.
    return new Date(date.setDate(lastday));
  }

// Create a new Date object representing the current date and time.
dt = new Date(); 
// Output the end of the week for the current date and time using the endOfWeek function, converted to a string.
console.log(endOfWeek(dt).toString());

Output:

Sun Jun 24 2018 18:32:20 GMT+0530 (India Standard Time)

Explanation:

In the exercise above,

• function endOfWeek(date): Declares a function named "endOfWeek()" that takes a 'date' parameter representing the input date.
• var lastday = date.getDate() - (date.getDay() - 1) + 6;: Calculates the date of the last day of the week by taking the day of the month ('date.getDate()'), subtracting the difference between the day of the week ('date.getDay()') and 1, and then adding 6.
• return new Date(date.setDate(lastday));: Sets the date to the calculated last day of the week ('lastday') using "date.setDate()" and returns a new Date object representing this updated date.
• dt = new Date();: Creates a new Date object representing the current date and time.
• console.log(endOfWeek(dt).toString());: Calls the "endOfWeek()" function with the current date ('dt') and logs the end of the week to the console after converting it to a string.

Flowchart:

Live Demo:

See the Pen JavaScript - Get the week end date-date-ex-51 by w3resource (@w3resource) on CodePen.

For more Practice: Solve these Related Problems:

• Write a JavaScript function that calculates the week end date (Sunday) for a given Date object.
• Write a JavaScript function that adds the necessary days to a date to reach the upcoming Sunday.
• Write a JavaScript function that returns the week end date formatted as "MM/DD/YYYY".
• Write a JavaScript function that validates the input date and handles edge cases if the date is already a Sunday.

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