JavaScript: Check if a number is a whole number or has a decimal place

Last update on August 19 2022 21:51:52 (UTC/GMT +8 hours)

JavaScript Math: Exercihse-38 with Solution

Write a JavaScript function to check if a number is a whole number or has a decimal place.

Note : Whole Numbers are simply the numbers 0, 1, 2, 3, 4, 5, ... (and so on). No Fractions!
Test Data :
console.log(number_test(25.66));
"Number has a decimal place."
console.log(number_test(10));
"It is a whole number."

Pictorial Presentation:

$JavaScript: Math - Check if a number is a whole number or has a decimal place.$

Sample Solution:-

HTML Code:

<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <title>JavaScript function to check if a number is a whole number or has a decimal place</title>
</head>
<body>

</body>
</html>

JavaScript Code:

function number_test(n)
{
   var result = (n - Math.floor(n)) !== 0; 
   
  if (result)
    return 'Number has a decimal place.';
   else
     return 'It is a whole number.';
  }

console.log(number_test(25.66));

console.log(number_test(10));

Sample Output:

Number has a decimal place.
It is a whole number.

Flowchart:

$Flowchart: JavaScript Math- Check if a number is a whole number or has a decimal place$

Live Demo:

See the Pen javascript-math-exercise-38 by w3resource (@w3resource) on CodePen.

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