JavaScript: Check whether a given positive number is a multiple of 3 or a multiple of 7

Last update on May 30 2022 10:07:54 (UTC/GMT +8 hours)

JavaScript Basic: Exercise-25 with Solution

Write a JavaScript program to check whether a given positive number is a multiple of 3 or a multiple of 7.

Pictorial Presentation:

JavaScript: Check if a given positive number is a multiple of 3 or a multiple of 7

Sample Solution:

HTML Code:

<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width">
  <title>JavaScript program to check whether a given positive number is a multiple of 3 or a multiple of 7. </title>
</head>
<body>

</body>
</html>

JavaScript Code:

function test37(x) 
{
  if (x % 3 == 0 || x % 7 == 0) 
  {
    return true;
  } 
  else {
    return false;
  }
}

console.log(test37(12));
console.log(test37(14));
console.log(test37(10));
console.log(test37(11));

Sample Output:

true
true
false
false

Flowchart:

ES6 Version:

function test37(x) 
{
  if (x % 3 == 0 || x % 7 == 0) 
  {
    return true;
  } 
  else {
    return false;
  }
}

console.log(test37(12));
console.log(test37(14));
console.log(test37(10));
console.log(test37(11));

Live Demo:

See the Pen JavaScript: check if a given positive number is a multiple of 3 or 7.-basic-ex-25 by w3resource (@w3resource) on CodePen.

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Next: Write a JavaScript program to create a new string from a given string taking the last 3 characters and added at both the front and back.

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