JavaScript: Formats a number to a human-readable string

Last update on May 30 2022 10:02:12 (UTC/GMT +8 hours)

JavaScript String: Exercise-15 with Solution

Write a JavaScript function to humanized number (Formats a number to a human-readable string.) with the correct suffix such as 1st, 2nd, 3rd or 4th.

Test Data:
console.log(humanize_format());
console.log(humanize_format(1));
console.log(humanize_format(8));
console.log(humanize_format(301));
console.log(humanize_format(402));
"1st"
"8th"
"301st"
"402nd"

Sample Solution:-

HTML Code:

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Formats a number to a human-readable string </title>
</head>
<body>
</body>
</html>

JavaScript Code:

humanize_format = function humanize(num) {
   if(typeof(num) == "undefined") return;
  if(num % 100 >= 11 && num % 100 <= 13)
        return num + "th";
        
        switch(num % 10) {
            case 1: return num + "st";
            case 2: return num + "nd";
            case 3: return num + "rd";
        }
        return num + "th";
    }
console.log(humanize_format());  
console.log(humanize_format(1));  
console.log(humanize_format(8));  
console.log(humanize_format(301));  
console.log(humanize_format(402));

Sample Output:

undefined
1st
8th
301st
402nd

Flowchart:

Live Demo:

See the Pen JavaScript Formats a number to a human-readable string - string-ex-15 by w3resource (@w3resource) on CodePen.

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Next: Write a JavaScript function to truncate a string if it is longer than the specified number of characters.

JavaScript: Tips of the Day

How to insert an item into an array at a specific index (JavaScript)?

What you want is the splice function on the native array object.

arr.splice(index, 0, item); will insert item into arr at the specified index (deleting 0 items first, that is, it's just an insert). In this example we will create an array and add an element to it into index 2:

var arr = []; arr[0] = "Jani"; arr[1] = "Hege"; arr[2] = "Stale"; arr[3] = "Kai Jim"; arr[4] = "Borge"; console.log(arr.join()); arr.splice(2, 0, "Lene"); console.log(arr.join());

Ref: https://bit.ly/2BXbp04