JavaScript: Get uppercase Ante meridiem and Post meridiem

JavaScript Datetime: Exercise-31 with Solution

Uppercase AM/PM

Write a JavaScript function to get uppercase Ante meridiem and Post meridiem.

Sample Solution:

JavaScript Code:

// Define a JavaScript function called upper_am_pm with parameter dt (date)
function upper_am_pm(dt) 
{ 
  // Check if the hour value of the provided date is less than 12
  // If true, return 'AM'; otherwise, return 'PM'
  return dt.getHours() < 12 ? 'AM' : 'PM';
}

// Create a new Date object representing the current date
dt = new Date(); 
// Output 'AM' or 'PM' based on whether the hour value of the current date is less than 12
console.log(upper_am_pm(dt)); 

// Create a new Date object representing November 1, 1989
dt = new Date(1989, 10, 1); 
// Output 'AM' or 'PM' based on whether the hour value of November 1, 1989, is less than 12
console.log(upper_am_pm(dt));

Output:

PM
AM

Explanation:

In the exercise above,

• The code defines a JavaScript function named "upper_am_pm()" with one parameter 'dt', representing a Date object.
• Inside the upper_am_pm function:
• It checks if the hour value of the provided Date object "dt" (obtained using "getHours()" method) is less than 12.
• If the hour value is less than 12, it returns 'AM', indicating the time is in the morning.
• Otherwise, it returns 'PM', indicating the time is in the afternoon or evening.
• The code then demonstrates the usage of the "upper_am_pm()" function:
• It creates a new Date object 'dt' representing the current date using 'new Date()'.
• It outputs 'AM' or 'PM' based on whether the hour value of the current date is less than 12 by calling the "upper_am_pm()" function with 'dt' and logging the result to the console.
• It creates another new Date object "dt" representing November 1, 1989, using 'new Date(1989, 10, 1)'.
• It outputs 'AM' or 'PM' based on whether the hour value of November 1, 1989, is less than 12 by calling the "upper_am_pm()" function with 'dt' and logging the result to the console.

Flowchart:

Live Demo:

See the Pen JavaScript - Get uppercase Ante meridiem and Post meridiem-date-ex-31 by w3resource (@w3resource) on CodePen.

For more Practice: Solve these Related Problems:

• Write a JavaScript function that returns "AM" or "PM" in uppercase based on the provided Date object's hour.
• Write a JavaScript function that converts a 12-hour time string with lowercase am/pm to uppercase.
• Write a JavaScript function that validates the Date object and outputs the uppercase meridiem correctly.
• Write a JavaScript function that uses conditional operators to determine and return "AM" or "PM" in uppercase.

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