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JavaScript JavaScript Functions Arrow Functions Testing for Number Arguments

Another solution

Hello (again)

Sorry, but since the teacher gave a solution by using another method, I would like to check if my response would be correct or not. Thank you!! :))))

let getRandomNumber = (upper, lower) => {
  if ( parseInt(upper) && parseInt(lower) ) {
      const randomNumber = (Math.floor(Math.random() * (upper - lower + 1)) + lower) 
      return randomNumber
  } else console.log(`You have to insert two numbers`)  

};

1 Answer

Steven Parker
Steven Parker
231,275 Points

This function would behave differently from the video example. The "throw" in the video aborts the entire program; but if an error occurs here, the function will long a message, but finish normally yet without returning anything.

Also, using a logic operator on two numbers is not a reliable way to detect if the values are not numbers. For example: try calling the function to get a random number between 0 and 9.