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

Last update on February 24 2025 12:02:46 (UTC/GMT +8 hours)

JavaScript Basic: Exercise-25 with Solution

Check if Number is Multiple of 3 or 7

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

This JavaScript program checks if a given positive number is a multiple of either 3 or 7. It uses the modulo operator (%) to determine if the number is divisible by 3 or 7 without any remainder. If the result is 0 for either operation, it means the number is a multiple of 3 or 7, respectively.

Visual Presentation:

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

Sample Solution:

JavaScript Code:

// Define a function named test37 that takes a parameter x
function test37(x) {
  // Check if x is divisible by 3 or 7
  if (x % 3 == 0 || x % 7 == 0) {
    // If true, return true
    return true;
  } 
  // If not divisible by 3 or 7, return false
  else {
    return false;
  }
}

// Log the result of calling the test37 function with the argument 12 to the console
console.log(test37(12));

// Log the result of calling the test37 function with the argument 14 to the console
console.log(test37(14));

// Log the result of calling the test37 function with the argument 10 to the console
console.log(test37(10));

// Log the result of calling the test37 function with the argument 11 to the console
console.log(test37(11));

Output:

true
true
false
false

Live Demo:

Flowchart:

ES6 Version:

// Using ES6 arrow function syntax to define the test37 function
const test37 = (x) => {
  // Check if x is divisible by 3 or 7
  if (x % 3 == 0 || x % 7 == 0) {
    // If true, return true
    return true;
  } 
  // If not divisible by 3 or 7, return false
  else {
    return false;
  }
};

// Log the result of calling the test37 function with the argument 12 to the console
console.log(test37(12));

// Log the result of calling the test37 function with the argument 14 to the console
console.log(test37(14));

// Log the result of calling the test37 function with the argument 10 to the console
console.log(test37(10));

// Log the result of calling the test37 function with the argument 11 to the console
console.log(test37(11));

For more Practice: Solve these Related Problems:

Write a JavaScript program that checks if a given number is a multiple of 3 or 7, but not both.
Write a JavaScript program that determines if any number in an array is exclusively a multiple of 3 or 7.
Write a JavaScript program that verifies if a positive integer is a multiple of either 3 or 7, prioritizing the smaller multiple if both apply.

Improve this sample solution and post your code through Disqus.

Previous: JavaScript program to create a new string from a given string with the first character of the given string added at the front and back.
Next: JavaScript program to create a new string from a given string taking the last 3 characters and added at both the front and back.