JavaScript: Get a full numeric representation of a year

JavaScript Datetime: Exercise-28 with Solution

Full Year

Write a JavaScript function to get a full numeric representation of a year (4 digits).

Test Data :
dt = new Date(2015, 10, 1);
console.log(full_year(dt));
2015

Sample Solution:

JavaScript Code:

// Define a JavaScript function called full_year with parameter dt (date)
function full_year(dt) 
{ 
  // Return the full year value of the provided date
  return dt.getFullYear(); 
}

// Create a new Date object representing the current date
dt = new Date(); 
// Output the full year value for the current date
console.log(full_year(dt)); 

// Create a new Date object representing November 1, 2015
dt = new Date(2015, 10, 1); 
// Output the full year value for November 1, 2015
console.log(full_year(dt));	

Output:

2018
2015

Explanation:

In the exercise above,

• The code defines a JavaScript function named "full_year()" with one parameter 'dt', representing a Date object.
• Inside the full_year function:
• It retrieves the full year value from the provided Date object "dt" using the "getFullYear()" method.
• It returns the retrieved full year value.
• The code then demonstrates the usage of the "full_year()" function:
• It creates a new Date object "dt" representing the current date using 'new Date()'.
• It outputs the full year value for the current date by calling the "full_year()" function with 'dt' and logging the result to the console.
• It creates another new Date object "dt" representing November 1, 2015, using 'new Date(2015, 10, 1)'.
• It outputs the full year value for November 1, 2015, by calling the "full_year()" function with 'dt' and logging the result to the console.

Flowchart:

Live Demo:

For more Practice: Solve these Related Problems:

• Write a JavaScript function that extracts and returns the full 4-digit year from a Date object.
• Write a JavaScript function that accepts a date string and outputs the full year as a number.
• Write a JavaScript function that validates a Date object and returns the year, handling two-digit inputs appropriately.
• Write a JavaScript function that converts a Date’s year to a string and ensures it is always four digits.

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