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JavaScript JavaScript Functions Arrow Functions Testing for Number Arguments

Posted by ja5on
ja5on
10,338 Points

how to have the same code but use prompt to pass numbers through the function?

function getRandomNumber(lower, higher) {
if ( isNaN(lower) || isNaN (higher)) {
throw Error("Both arguments must be a number.");
} else {
var randomNumber = Math.floor(Math.random() * (higher - lower +1)) +lower;
return randomNumber;
}
}

console.log(The random number is ${getRandomNumber(1, 5)});
console.log(The random number is ${getRandomNumber(10, 30)});
console.log(The random number is ${getRandomNumber(100, 300)});
console.log(The random number is ${getRandomNumber(1000, 3000)});
console.log("MESSAGE:- below is to test for an error; ten isn't defined! ");
console.log(This is to test for an error ${getRandomNumber(ten, 50)});

1 Answer

Jaskaran Pannu
Jaskaran Pannu
1,564 Points

Hint: You can use "prompt" method to take ask for the input. and then use 'parseInt' so as to convert from String to Number.

Solution: function getRandomNumber() {

let lower = parseInt(prompt("Enter Lower Number")); let higher = parseInt(prompt("Enter Higher Number"));

if (isNaN(lower) || isNaN(higher)) { throw Error("Both arguments must be a number."); } else { var randomNumber = Math.floor(Math.random() * (higher - lower + 1)) + lower; return randomNumber; } } console.log(getRandomNumber());

ja5on
ja5on
10,338 Points

Yes I did use prompt but was leaving out parseInt, thank you! :-)