Exceptions

In JavaScript, exceptions are a way of handling unexpected errors or exceptional situations that may occur during the execution of a program. When an error occurs, an exception object is created, and the normal flow of the program is disrupted. To handle exceptions, JavaScript provides a mechanism known as try...catch.

try...catch

The try...catch statement is comprised of a try block and either a catch block, a finally block, or both.

try {
  // Code that might throw an exception
  let result = abc / 0; // This will throw a error
  console.log(result); // This line will not be executed
} catch (error) {
  console.log(`An error occurred: ${error.message}`);
  // An error occurred: abc is not defined
} finally {
  console.log('This will be executed regardless of whether an exception occurred or not.');
}

Code Challenge

Write a function safeDivision that takes two parameters (numerator and denominator) and returns the result of dividing the numerator by the denominator. However, if the denominator is zero, catch the exception and return a custom error message.