JavaScript: Compute the absolute difference between a specified number and 19

Last update on May 30 2022 10:02:31 (UTC/GMT +8 hours)

JavaScript Basic: Exercise-17 with Solution

Write a JavaScript program to compute the absolute difference between a specified number and 19. Returns triple their absolute difference if the specified number is greater than 19.

Sample Solution:

HTML Code:

<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width">
  <title>JavaScript program to compute the absolute difference between a specified number and 19.  Returns triple their absolute difference if the specified number is greater than 19.</title>
</head>
<body>

</body>
</html>

JavaScript Code:

function diff_num(n) {
  if (n <= 19) {
    return (19 - n);
    }
  else
    {
     return (n - 19) * 3;
    }
}

console.log(diff_num(12));
console.log(diff_num(19));
console.log(diff_num(22));

Sample Output:

7
0
9

Flowchart:

ES6 Version:

function diff_num(n) {
  if (n <= 19) {
    return (19 - n);
    }
  else
    {
     return (n - 19) * 3;
    }
}

console.log(diff_num(12));
console.log(diff_num(19));
console.log(diff_num(22));

Live Demo:

See the Pen JavaScript: Absolute difference- basic-ex-17 by w3resource (@w3resource) on CodePen.

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Previous: Write a JavaScript program to compute the sum of the two given integers.
Next: Write a JavaScript program to check two given numbers and return true if one of the number is 50 or if their sum is 50.

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