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JavaScript: Get the difference between a given number

JavaScript Basic: Exercise-15 with Solution

Write a JavaScript program to get the difference between a given number and 13, if the number is greater than 13 return double the absolute difference.

Sample Solution:

HTML Code:

<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width">
  <title>The difference between a given number and 13, if the number is greater than 13 return double the absolute difference.</title>
</head>
<body>

</body>
</html>

JavaScript Code:

function difference(n)
 {
    if (n <= 13)
        return 13 - n;
    else
        return (n - 13) * 2;
 }
console.log(difference(32))
console.log(difference(11))

Sample Output:

38
2

ES6 Version:

function difference(n)
 {
    if (n <= 13)
        return 13 - n;
    else
        return (n - 13) * 2;
 }
console.log(difference(32))
console.log(difference(11))

Live Demo:

See the Pen JavaScript: Number difference - basic-ex-15 by w3resource (@w3resource) on CodePen.


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JavaScript: Tips of the Day

Converts a string to title case

Example:

const toTitleCase = str =>
  str
    .match(/[A-Z]{2,}(?=[A-Z][a-z]+[0-9]*|\b)|[A-Z]?[a-z]+[0-9]*|[A-Z]|[0-9]+/g)
    .map(x => x.charAt(0).toUpperCase() + x.slice(1))
    .join(' ');
console.log(toTitleCase('some_database_field_name')); // 'Some Database Field Name'
console.log(toTitleCase('Some label that needs to be title-cased')); // 'Some Label That Needs To Be Title Cased'
console.log(toTitleCase('some-package-name')); // 'Some Package Name'
console.log(toTitleCase('some-mixed_string with spaces_underscores-and-hyphens')); // 'Some Mixed String With Spaces Underscores And Hyphens' 

Output:

"Some Database Field Name"
"Some Label That Needs To Be Title Cased"
"Some Package Name"
"Some Mixed String With Spaces Underscores And Hyphens"