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Number prime test in JavaScript by creating a custom function?
Create a custom function to test a number is prime or not in JavaScript.
Example
Following is the code −
function checkNumberIsPrime(number) { var flag = false; for (start = 2; start < number / 2; start++) { if (number % start === 0) { flag = false; break; } else { flag = true; } } return flag; } var number = 11; if (checkNumberIsPrime(number) == true) { console.log("The number is prime"); } else { console.log("The number is not prime"); }
To run the above program, you need to use the following command −
node fileName.js.
Here, my file name is demo230.js.
Output
The output is as follows −
PS C:\Users\Amit\JavaScript-code> node demo230.js The number is prime
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