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### Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today. # Here is my code

```var num1  = parseInt(prompt("Enter the 1st Number"));
var num2 = parseInt(prompt("Enter the 2nd Number"));

function randomNumber(a, b)
{

if(a > b)
{
var randomNum = Math.floor(Math.random() * (a - b + 1)) + b;
}

else
{
var randomNum = Math.floor(Math.random() * (b - a + 1)) + a;
}

}
var numArgument = randomNumber(num1, num2);
```

Would love to know if anyone has a better way to do it. ## Here's a possible alternative:

```function randomNumber(a, b) {
if (a > b) [a, b] = [b, a];
return Math.floor(Math.random() * (b - a + 1)) + a;
}
var numArgument = randomNumber(
parseInt(prompt("Enter the 1st Number")),
parseInt(prompt("Enter the 2nd Number"))
);
```

The argument swapping shown on the 2nd line makes use of a technique called destructuring assignment.

Also note that in the original code, randomNumber did not return anything, so the assignment of numArgument would always be "`undefined`". But if you add "`return randomNum;`" at the end of the function then operationally it will be identical to this code.

Steven Parker .. Thank You for sharing this new technique. Its a wonderful piece of code. Can you please tell me more about this block:

```if (a > b) [a, b] = [b, a];
```

Its not getting around my head very clearly. What is [a, b] = [b, a] doing?

Hey Steven Parker .. I understood what it is doing!! Thanks..

hello. i cant understand, because it says generate random number not input number right? or i misunderstand the question? my mind is flying away the topic is starting to be harder >.< The input is for the range of the random number. The formula picks a random number so it will never be less than the low number you give, and never higher than the high number you give. So for example, if you were to input the numbers 20 and 30, you're asking the computer to "pick any number between 20 and 30".

ahh i see . thanks for that bro. I feel harder to understand the topics, maybe the lecturer at this stage is so fast >.<